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Amaducci S, Colonna N, Cosentino L, Cristallo S, Finocchiaro P, Krtička M, Massimi C, Mastromarco M, Mazzone A, Maugeri EA, Mengoni A, Roederer IU, Straniero O, Valenta S, Vescovi D, Aberle O, Alcayne V, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Billowes J, Bosnar D, Brown A, Busso M, Caamaño M, Caballero-Ontanaya L, Calviño F, Calviani M, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Cortés G, Cortés-Giraldo MA, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domínguez B, Ferrari A, Furman V, Göbel K, Garg R, Gawlik-Ramięga A, Gilardoni S, Gonçalves IF, González-Romero E, Guerrero C, Gunsing F, Harada H, Heinitz S, Heyse J, Jenkins DG, Junghans A, Käppeler F, Kadi Y, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Kurtulgil D, Ladarescu I, Lederer-Woods C, Leeb H, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Mastinu P, Mendoza E, Michalopoulou V, Milazzo PM, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos-Doval D, Rauscher T, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin NV, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Thomas T, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright T, Žugec P. Measurement of the ^{140}Ce(n,γ) Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe. Phys Rev Lett 2024; 132:122701. [PMID: 38579210 DOI: 10.1103/physrevlett.132.122701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/09/2023] [Accepted: 01/31/2024] [Indexed: 04/07/2024]
Abstract
^{140}Ce(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at the n_TOF facility, with an unprecedented combination of a high purity sample and low neutron-sensitivity detectors. The measured Maxwellian averaged cross section is up to 40% higher than previously accepted values. Stellar model calculations indicate a reduction around 20% of the s-process contribution to the Galactic cerium abundance and smaller sizeable differences for most of the heavier elements. No variations are found in the nucleosynthesis from massive stars.
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Affiliation(s)
- S Amaducci
- INFN Laboratori Nazionali del Sud, Catania, Italy
| | - N Colonna
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - L Cosentino
- INFN Laboratori Nazionali del Sud, Catania, Italy
| | - S Cristallo
- Istituto Nazionale di Astrofisica - Osservatorio Astronomico d'Abruzzo, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Italy
| | | | - M Krtička
- Charles University, Prague, Czech Republic
| | - C Massimi
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
| | - M Mastromarco
- European Organization for Nuclear Research (CERN), Switzerland
| | - A Mazzone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
- Consiglio Nazionale delle Ricerche, Bari, Italy
| | - E A Maugeri
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - A Mengoni
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile (ENEA), Italy
| | - I U Roederer
- Department of Physics, North Carolina State University, Raleigh, Norh Carolina 27695, USA
- Department of Astronomy, University of Michigan, Ann Arbor, Michigan 48109, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements (JINA-CEE), USA
| | - O Straniero
- Istituto Nazionale di Astrofisica - Osservatorio Astronomico d'Abruzzo, Italy
- INFN Sezione Napoli, Napoli, Italy
| | - S Valenta
- Charles University, Prague, Czech Republic
| | - D Vescovi
- Istituto Nazionale di Astrofisica - Osservatorio Astronomico d'Abruzzo, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Italy
| | - O Aberle
- European Organization for Nuclear Research (CERN), Switzerland
| | - V Alcayne
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
| | | | - L Audouin
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
| | - V Babiano-Suarez
- Instituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
| | - M Bacak
- European Organization for Nuclear Research (CERN), Switzerland
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
- CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Barbagallo
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
- European Organization for Nuclear Research (CERN), Switzerland
| | - S Bennett
- University of Manchester, United Kingdom
| | - E Berthoumieux
- CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J Billowes
- University of Manchester, United Kingdom
| | - D Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - A Brown
- University of York, United Kingdom
| | - M Busso
- Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Italy
- Dipartimento di Fisica e Geologia, Università di Perugia, Italy
| | - M Caamaño
- IGFAE-Universidade de Santiago de Compostela, Spain
| | | | - F Calviño
- Universitat Politècnica de Catalunya, Spain
| | - M Calviani
- European Organization for Nuclear Research (CERN), Switzerland
| | - D Cano-Ott
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
| | | | - F Cerutti
- European Organization for Nuclear Research (CERN), Switzerland
| | - E Chiaveri
- European Organization for Nuclear Research (CERN), Switzerland
- University of Manchester, United Kingdom
| | - G Cortés
- Universitat Politècnica de Catalunya, Spain
| | | | - L A Damone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
- Dipartimento Interateneo di Fisica, Università degli Studi di Bari, Italy
| | - P J Davies
- University of Manchester, United Kingdom
| | - M Diakaki
- European Organization for Nuclear Research (CERN), Switzerland
- National Technical University of Athens, Greece
| | - M Dietz
- School of Physics and Astronomy, University of Edinburgh, United Kingdom
| | - C Domingo-Pardo
- Instituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
| | - R Dressler
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - Q Ducasse
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - E Dupont
- CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - I Durán
- IGFAE-Universidade de Santiago de Compostela, Spain
| | - Z Eleme
- University of Ioannina, Greece
| | | | - A Ferrari
- European Organization for Nuclear Research (CERN), Switzerland
| | - V Furman
- Affiliated with an institute or an international laboratory covered by a cooperation agreement with CERN
| | - K Göbel
- Goethe University Frankfurt, Germany
| | - R Garg
- School of Physics and Astronomy, University of Edinburgh, United Kingdom
| | | | - S Gilardoni
- European Organization for Nuclear Research (CERN), Switzerland
| | | | - E González-Romero
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
| | | | - F Gunsing
- CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - H Harada
- Japan Atomic Energy Agency (JAEA), Tokai-Mura, Japan
| | - S Heinitz
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - J Heyse
- European Commission, Joint Research Centre (JRC), Geel, Belgium
| | | | - A Junghans
- Helmholtz-Zentrum Dresden-Rossendorf, Germany
| | - F Käppeler
- Karlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
| | - Y Kadi
- European Organization for Nuclear Research (CERN), Switzerland
| | - A Kimura
- Japan Atomic Energy Agency (JAEA), Tokai-Mura, Japan
| | - I Knapová
- Charles University, Prague, Czech Republic
| | - M Kokkoris
- National Technical University of Athens, Greece
| | - Y Kopatch
- Affiliated with an institute or an international laboratory covered by a cooperation agreement with CERN
| | | | - I Ladarescu
- Instituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
| | - C Lederer-Woods
- School of Physics and Astronomy, University of Edinburgh, United Kingdom
| | - H Leeb
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | | | - S J Lonsdale
- School of Physics and Astronomy, University of Edinburgh, United Kingdom
| | - D Macina
- European Organization for Nuclear Research (CERN), Switzerland
| | - A Manna
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
| | - T Martínez
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
| | - A Masi
- European Organization for Nuclear Research (CERN), Switzerland
| | - P Mastinu
- INFN Laboratori Nazionali di Legnaro, Italy
| | - E Mendoza
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
| | - V Michalopoulou
- European Organization for Nuclear Research (CERN), Switzerland
- National Technical University of Athens, Greece
| | - P M Milazzo
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
| | - F Mingrone
- European Organization for Nuclear Research (CERN), Switzerland
| | - J Moreno-Soto
- CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Musumarra
- Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Italy
- Department of Physics and Astronomy, University of Catania, Italy
| | - A Negret
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
| | - R Nolte
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | | | - A Oprea
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
| | | | - A Pavlik
- University of Vienna, Faculty of Physics, Vienna, Austria
| | | | - C Petrone
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
| | - L Piersanti
- Istituto Nazionale di Astrofisica - Osservatorio Astronomico d'Abruzzo, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Italy
| | - E Pirovano
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | | | | | | | - D Ramos-Doval
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
| | - T Rauscher
- Department of Physics, University of Basel, Switzerland
- Centre for Astrophysics Research, University of Hertfordshire, United Kingdom
| | | | - D Rochman
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - C Rubbia
- European Organization for Nuclear Research (CERN), Switzerland
| | - M Sabaté-Gilarte
- European Organization for Nuclear Research (CERN), Switzerland
- Universidad de Sevilla, Spain
| | - A Saxena
- Bhabha Atomic Research Centre (BARC), India
| | - P Schillebeeckx
- European Commission, Joint Research Centre (JRC), Geel, Belgium
| | - D Schumann
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - A Sekhar
- University of Manchester, United Kingdom
| | - A G Smith
- University of Manchester, United Kingdom
| | - N V Sosnin
- University of Manchester, United Kingdom
| | - P Sprung
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | | | - G Tagliente
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - J L Tain
- Instituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
| | | | - L Tassan-Got
- European Organization for Nuclear Research (CERN), Switzerland
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
- National Technical University of Athens, Greece
| | - Th Thomas
- Goethe University Frankfurt, Germany
| | | | - A Tsinganis
- European Organization for Nuclear Research (CERN), Switzerland
| | - J Ulrich
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - S Urlass
- European Organization for Nuclear Research (CERN), Switzerland
- Helmholtz-Zentrum Dresden-Rossendorf, Germany
| | - G Vannini
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
| | - V Variale
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - P Vaz
- Instituto Superior Técnico, Lisbon, Portugal
| | - A Ventura
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - V Vlachoudis
- European Organization for Nuclear Research (CERN), Switzerland
| | - R Vlastou
- National Technical University of Athens, Greece
| | - A Wallner
- Australian National University, Canberra, Australia
| | - P J Woods
- School of Physics and Astronomy, University of Edinburgh, United Kingdom
| | - T Wright
- University of Manchester, United Kingdom
| | - P Žugec
- Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
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Sá AC, Barateiro A, Bednarz BP, Almeida P, Vaz P, Madaleno T. Corrigendum: Comparison of 3DCRT and IMRT out-of-field doses in pediatric patients using Monte Carlo simulations with treatment planning system calculations and measurements. Front Oncol 2023; 13:1293922. [PMID: 37876973 PMCID: PMC10593431 DOI: 10.3389/fonc.2023.1293922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 09/28/2023] [Indexed: 10/26/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fonc.2022.879167.].
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Affiliation(s)
- Ana Cravo Sá
- Radiation Protection and Safety Group, Centro de Ciências e Tecnologias Nucleares (C2TN), Bobadela, Portugal
- Diagnostic, Therapeutic and Public Health Sciences Department, Escola Superior de Tecnologia da Saúde de Lisboa (ESTeSL), Lisbon, Portugal
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| | - Andreia Barateiro
- Radiotherapy Department, Portuguese Institute of Oncology Francisco Gentil, Lisbon, Portugal
| | - Bryan P. Bednarz
- Department of Medical Physics, Wisconsin Institutes for Medical Research, University of Wisconsin Hospital and Clinics, Madison, WI, United States
| | - Pedro Almeida
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| | - Pedro Vaz
- Radiation Protection and Safety Group, Centro de Ciências e Tecnologias Nucleares (C2TN), Bobadela, Portugal
| | - Tiago Madaleno
- Radiotherapy Department, Portuguese Institute of Oncology Francisco Gentil, Lisbon, Portugal
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Karajeanes E, Bila D, Luis M, Tovela M, Anjos C, Ramanlal N, Vaz P, Lapão LV. The Infomóvel-An information system for managing HIV/AIDS patients in rural areas of Mozambique. BMC Med Inform Decis Mak 2023; 23:187. [PMID: 37723450 PMCID: PMC10507969 DOI: 10.1186/s12911-023-02281-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 08/31/2023] [Indexed: 09/20/2023] Open
Abstract
BACKGROUND Mobile health is gradually revolutionizing the way medical care is delivered worldwide. In Mozambique, a country with a high human immunodeficiency virus prevalence, where antiretroviral treatment coverage is 77% accompanied by a 67% of retention rate, the use of mobile health technology may boost the antiretroviral treatment, by delivering care beyond health facilities and reaching underrepresented groups. Leveraging new technologies is crucial to reach the 95-95-95 United Nations target by 2030. The design, development, implementation, and evaluation of a mobile health platform called Infomóvel were covered in this article. Its intended use involves collaboration with community health workers and aims to increase human immunodeficiency virus patient access, adherence, and retention to care. METHODS Using the Design Science Research Methodology, Infomóvel was created, as well as this publication. The explanation of various actions includes everything from problem description to observational study and goal-following for a solution, which results in the design and development of a platform proposal. Before the utility assessment of Infomóvel was conducted to make adjustments, a demonstration phase was conducted in one region of Mozambique. RESULTS The initial subjects of the Infomóvel flowchart and physical process design were patients receiving antiretroviral medication who were enrolled in the patients tracking system and who had consented to home visits. The case manager examines the file before importing it into the Infomóvel database stored on a cloud server using the website www.commcarehq.org . The case manager application synchronises with the Infomóvel server database, enabling the import of latest data and access to the lists of new patients and community health workers. The community health worker uses his phone to access his application, which allows him to record the geographic coordinates and sort the list of patients by priority and type of visit. CONCLUSION Results from Infomóvel add to the growing body of data showing that mobile health techniques are beneficial for managing stable individuals with chronic conditions in Mozambique. These approaches can be scaled up and better utilised. However, additional studies should be conducted to quantify the resources needed to implement on a larger scale.
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Affiliation(s)
- E Karajeanes
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique.
- Global Health and Tropical Medicine, Instituto de Higiene E Medicina Tropical, Universidade Nova de Lisboa, Rua da Junqueira, N° 100, 1349-008, Lisboa, Portugal.
| | - D Bila
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique
| | - M Luis
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique
| | - M Tovela
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique
| | - C Anjos
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique
| | - N Ramanlal
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique
| | - P Vaz
- Fundação Ariel Glaser Contra O SIDA Pediátrico, Avenida Agostinho Neto N° 620, Maputo, Mozambique
| | - L V Lapão
- Global Health and Tropical Medicine, Instituto de Higiene E Medicina Tropical, Universidade Nova de Lisboa, Rua da Junqueira, N° 100, 1349-008, Lisboa, Portugal
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Borbinha J, Ferreira P, Costa D, Vaz P, Di Maria S. Targeted radionuclide therapy directed to the tumor phenotypes: A dosimetric approach using MC simulations. Appl Radiat Isot 2023; 192:110569. [PMID: 36436229 DOI: 10.1016/j.apradiso.2022.110569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/07/2022] [Accepted: 11/16/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND In Targeted Radionuclide Therapy (TRT), the continuous technological effort in imaging tumor phenotypes (i.e. sub-volumes with different phenotypic characteristics) and in precise radiopharmaceutical tumor-targeting, is allowing for a better dosimetric optimization at the tumor phenotype level. The aim of this study was to evaluate the dosimetric efficiency (considering strategic absorbed dose delivery to the phenotypes) of personalized TRT directed to the tumor phenotypes. METHODS The dosimetric assessment was performed using a four-phenotype realistic tumor model implemented within the ICRP reference voxel phantom and simulations using the state-of-the-art Monte Carlo program PENELOPE. The dose assessment was performed for five radionuclides commonly used in therapy and/or diagnostic procedures: 125I, 99mTc, 177Lu, 161Tb and 67Ga. Two irradiation scenarios were considered: (i) the Whole Tumor Treatment Planning Scenario (WTTPS), i.e. the four phenotypes irradiated with the same radionuclide; (ii) the Phenotype Treatment Planning Scenario (PTPS), i.e. each phenotype irradiated by a single radionuclide. The optimal radionuclide configurations were studied considering the maximization of the absorbed dose delivered to the tumor and the minimization of dose to healthy tissues. RESULTS In WTTPS, 125I outperforms the other radionuclides in terms of the ratio of the maximum absorbed dose delivered to the tumor and the minimum absorbed dose delivered to healthy tissues. In the PTPS, the use of 161Tb in combination with the other radionuclides maximizes the absorbed dose in the tumor tissues while simultaneously minimizing dose to healthy tissue, compared to the WTTPS. In agreement with recent pre-clinical studies, our computational results confirm and indicate the beneficial additive dosimetric effects of Auger and conversion electrons of 161Tb with respect to 177Lu, when considering the same cumulated activity for both. Interestingly, in considering a realistic tumor model, the better dosimetric performances of 161Tb were confirmed also for tumor volumes ranging from 1.98 cm3 to 33.32 cm3. CONCLUSIONS Dose assessment in realistic non-homogeneous tumor models could provide more insights with respect to consider only homogenous water-spheres tumor models and should be taken into account in dosimetry-based TRT planning studies.
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Affiliation(s)
- Jorge Borbinha
- Centro de Ciências e Tecnologias Nucleares - Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7, 2695-066, Bobadela, Portugal.
| | - Paulo Ferreira
- Champalimaud Centre for the Unknown, Fundação Champalimaud, Avenida Brasília, 1400-038, Lisboa, Portugal.
| | - Durval Costa
- Champalimaud Centre for the Unknown, Fundação Champalimaud, Avenida Brasília, 1400-038, Lisboa, Portugal.
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares - Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7, 2695-066, Bobadela, Portugal.
| | - Salvatore Di Maria
- Centro de Ciências e Tecnologias Nucleares - Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7, 2695-066, Bobadela, Portugal.
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Marques L, Félix L, Cruz G, Coelho V, Caetano J, Vale A, Cruz C, Alves L, Vaz P. Neutron and Gamma-Ray Detection System Coupled to a Multirotor for Screening of Shipping Container Cargo. Sensors (Basel) 2022; 23:329. [PMID: 36616926 PMCID: PMC9824015 DOI: 10.3390/s23010329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
In order to detect special nuclear materials and other radioactive materials in Security and Defense scenarios, normally, a combination of neutron and gamma-ray detection systems is used. In particular, to avoid illicit traffic of special nuclear materials and radioactive sources/materials, radiation portal monitors are placed at seaports to inspect shipping-container cargo. Despite their large volume (high efficiency), these detection systems are expensive, and therefore only a fraction of these containers are inspected. In this work, a novel mobile radiation detection system is presented, based on an EJ-200 plastic scintillator for the detection of gamma rays and beta particles, and a neutron detector EJ-426HD plastic scintillator (with 6Li) embedded in a compact and modular moderator. The use of silicon photomultipliers in both detectors presented advantages such as lightweight, compactness, and low power consumption. The developed detection system was integrated in a highly maneuverable multirotor. Monte Carlo simulations were validated by laboratory measurements and field tests were performed using real gamma-ray and neutron sources. The detection and localization within one meter was achieved using a maximum likelihood estimation algorithm for 137Cs sources (4 MBq), as well as the detection of 241Am-beryllium (1.45 GBq) source placed inside the shipping container.
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Affiliation(s)
- Luís Marques
- Centro de Investigação da Academia da Força Aérea, Academia da Força Aérea, Instituto Universitário Militar, Granja do Marquês, 2715-021 Pêro Pinheiro, Portugal
| | - Luís Félix
- Centro de Investigação da Academia da Força Aérea, Academia da Força Aérea, Instituto Universitário Militar, Granja do Marquês, 2715-021 Pêro Pinheiro, Portugal
| | - Gonçalo Cruz
- Centro de Investigação da Academia da Força Aérea, Academia da Força Aérea, Instituto Universitário Militar, Granja do Marquês, 2715-021 Pêro Pinheiro, Portugal
| | - Vasco Coelho
- Centro de Investigação da Academia da Força Aérea, Academia da Força Aérea, Instituto Universitário Militar, Granja do Marquês, 2715-021 Pêro Pinheiro, Portugal
| | - João Caetano
- Centro de Investigação da Academia da Força Aérea, Academia da Força Aérea, Instituto Universitário Militar, Granja do Marquês, 2715-021 Pêro Pinheiro, Portugal
| | - Alberto Vale
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Carlos Cruz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Lisboa, Portugal
| | - Luís Alves
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Lisboa, Portugal
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Lisboa, Portugal
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6
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Lederer-Woods C, Aberle O, Andrzejewski J, Audouin L, Bécares V, Bacak M, Balibrea J, Barbagallo M, Barros S, Battino U, Bečvář F, Beinrucker C, Berthoumieux E, Billowes J, Bosnar D, Brugger M, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Diakaki M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik-Ramięga A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Guerrero C, Gunsing F, Harada H, Heftrich T, Heinitz S, Heyse J, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Katabuchi T, Kavrigin P, Ketlerov V, Khryachkov V, Kimura A, Kivel N, Kokkoris M, Krtička M, Leal-Cidoncha E, Leeb H, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Losito R, Macina D, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Schumann D, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weigand M, Weiss C, Wolf C, Woods PJ, Wright T, Žugec P. 74 Ge( n , γ ) cross section below 70 keV measured at n_TOF CERN. Eur Phys J A Hadron Nucl 2022; 58:239. [PMID: 36514540 PMCID: PMC9734248 DOI: 10.1140/epja/s10050-022-00878-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/31/2022] [Indexed: 06/17/2023]
Abstract
Neutron capture reaction cross sections on 74 Ge are of importance to determine 74 Ge production during the astrophysical slow neutron capture process. We present new resonance data on 74 Ge( n , γ ) reactions below 70 keV neutron energy. We calculate Maxwellian averaged cross sections, combining our data below 70 keV with evaluated cross sections at higher neutron energies. Our stellar cross sections are in agreement with a previous activation measurement performed at Forschungszentrum Karlsruhe by Marganiec et al., once their data has been re-normalised to account for an update in the reference cross section used in that experiment.
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Affiliation(s)
- C. Lederer-Woods
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
| | - O. Aberle
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | | | - L. Audouin
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - V. Bécares
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - M. Bacak
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | - J. Balibrea
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - M. Barbagallo
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - S. Barros
- Instituto Superior Técnico, Lisbon, Portugal
| | | | - F. Bečvář
- Charles University, Prague, Czech Republic
| | | | - E. Berthoumieux
- CEA Irfu, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | | | - D. Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - M. Brugger
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - M. Caamaño
- University of Santiago de Compostela, Santiago, Spain
| | - F. Calviño
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | - M. Calviani
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - D. Cano-Ott
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - R. Cardella
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - A. Casanovas
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | - D. M. Castelluccio
- Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - F. Cerutti
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - Y. H. Chen
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - E. Chiaveri
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - N. Colonna
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - G. Cortés
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | | | - L. Cosentino
- INFN Laboratori Nazionali del Sud, Catania, Italy
| | - L. A. Damone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
- Dipartimento Interateneo di Fisica, Università degli Studi di Bari, Bari, Italy
| | - M. Diakaki
- CEA Irfu, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - C. Domingo-Pardo
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia, Spain
| | - R. Dressler
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - E. Dupont
- CEA Irfu, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - I. Durán
- University of Santiago de Compostela, Santiago, Spain
| | | | - A. Ferrari
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - P. Ferreira
- Instituto Superior Técnico, Lisbon, Portugal
| | | | - V. Furman
- Joint Institute for Nuclear Research (JINR), Dubna, Russia
| | - K. Göbel
- Goethe University Frankfurt, Frankfurt, Germany
| | - A. R. García
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | | | - T. Glodariu
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
| | | | - E. González-Romero
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - A. Goverdovski
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| | - E. Griesmayer
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | | | - F. Gunsing
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- CEA Irfu, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - H. Harada
- Japan Atomic Energy Agency (JAEA), Tokai-Mura, Japan
| | - T. Heftrich
- Goethe University Frankfurt, Frankfurt, Germany
| | - S. Heinitz
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - J. Heyse
- European Commission, Joint Research Centre (JRC), Geel, Belgium
| | | | - E. Jericha
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | - F. Käppeler
- Karlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
| | - Y. Kadi
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | | | - P. Kavrigin
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | - V. Ketlerov
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| | - V. Khryachkov
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| | - A. Kimura
- Japan Atomic Energy Agency (JAEA), Tokai-Mura, Japan
| | - N. Kivel
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - M. Kokkoris
- National Technical University of Athens, Athens, Greece
| | - M. Krtička
- Charles University, Prague, Czech Republic
| | | | - H. Leeb
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | | | - S. Lo Meo
- Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - S. J. Lonsdale
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
| | - R. Losito
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - D. Macina
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | | | - T. Martínez
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - C. Massimi
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
| | - P. Mastinu
- Istituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
| | - M. Mastromarco
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - F. Matteucci
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
- Dipartimento di Astronomia, Università di Trieste, Trieste, Italy
| | | | - E. Mendoza
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - A. Mengoni
- Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
| | - P. M. Milazzo
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
| | - F. Mingrone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - M. Mirea
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
| | - S. Montesano
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - A. Musumarra
- INFN Laboratori Nazionali del Sud, Catania, Italy
- Dipartimento di Fisica e Astronomia, Università di Catania, Catania, Italy
| | - R. Nolte
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - A. Oprea
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
| | | | - A. Pavlik
- Faculty of Physics, University of Vienna, Vienna, Austria
| | | | - I. Porras
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- University of Granada, Granada, Spain
| | - J. Praena
- University of Granada, Granada, Spain
| | | | - K. Rajeev
- Bhabha Atomic Research Centre (BARC), Mumbai, India
| | - T. Rauscher
- Centre for Astrophysics Research, University of Hertfordshire, Hatfield, UK
- Department of Physics, University of Basel, Basel, Switzerland
| | - R. Reifarth
- Goethe University Frankfurt, Frankfurt, Germany
| | | | - P. C. Rout
- Bhabha Atomic Research Centre (BARC), Mumbai, India
| | - C. Rubbia
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - J. A. Ryan
- University of Manchester, Manchester, UK
| | - M. Sabaté-Gilarte
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- Universidad de Sevilla, Seville, Spain
| | - A. Saxena
- Bhabha Atomic Research Centre (BARC), Mumbai, India
| | | | - S. Schmidt
- Goethe University Frankfurt, Frankfurt, Germany
| | - D. Schumann
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - P. Sedyshev
- Joint Institute for Nuclear Research (JINR), Dubna, Russia
| | | | | | - G. Tagliente
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - J. L. Tain
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia, Spain
| | | | - L. Tassan-Got
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - A. Tsinganis
- National Technical University of Athens, Athens, Greece
| | - S. Valenta
- Charles University, Prague, Czech Republic
| | - G. Vannini
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
| | - V. Variale
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - P. Vaz
- Instituto Superior Técnico, Lisbon, Portugal
| | - A. Ventura
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - V. Vlachoudis
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - R. Vlastou
- National Technical University of Athens, Athens, Greece
| | - A. Wallner
- Australian National University, Canberra, Australia
| | - S. Warren
- University of Manchester, Manchester, UK
| | - M. Weigand
- Goethe University Frankfurt, Frankfurt, Germany
| | - C. Weiss
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- TU Wien, Atominstitut, Stadionallee 2, 1020 Wien, Austria
| | - C. Wolf
- Goethe University Frankfurt, Frankfurt, Germany
| | - P. J. Woods
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
| | - T. Wright
- University of Manchester, Manchester, UK
| | - P. Žugec
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
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Di Maria S, Vedantham S, Vaz P. Breast dosimetry in alternative X-ray-based imaging modalities used in current clinical practices. Eur J Radiol 2022; 155:110509. [PMID: 36087425 PMCID: PMC9851082 DOI: 10.1016/j.ejrad.2022.110509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/18/2022] [Accepted: 08/30/2022] [Indexed: 01/21/2023]
Abstract
In X-ray breast imaging, Digital Mammography (DM) and Digital Breast Tomosynthesis (DBT), are the standard and largely used techniques, both for diagnostic and screening purposes. Other techniques, such as dedicated Breast Computed Tomography (BCT) and Contrast Enhanced Mammography (CEM) have been developed as an alternative or a complementary technique to the established ones. The performance of these imaging techniques is being continuously assessed to improve the image quality and to reduce the radiation dose. These imaging modalities are predominantly used in the diagnostic setting to resolve incomplete or indeterminate findings detected with conventional screening examinations and could potentially be used either as an adjunct or as a primary screening tool in select populations, such as for women with dense breasts. The aim of this review is to describe the radiation dosimetry for these imaging techniques, and to compare the mean glandular dose with standard breast imaging modalities, such as DM and DBT.
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Affiliation(s)
- S Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066 Bobadela LRS, Portugal.
| | - S Vedantham
- Department of Medical Imaging, The University of Arizona, Tucson, AZ, USA; Department of Biomedical Engineering, The University of Arizona, Tucson, AZ, USA
| | - P Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066 Bobadela LRS, Portugal
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Portugal M, Baptista M, Vaz P, Belchior A. Patients’ organ dose and risk assessment in interventional cardiology procedures. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sá AC, Barateiro A, Bednarz BP, Almeida P, Vaz P, Madaleno T. Comparison of 3DCRT and IMRT out-of-field doses in pediatric patients using Monte Carlo simulations with treatment planning system calculations and measurements. Front Oncol 2022; 12:879167. [PMID: 35992845 PMCID: PMC9388939 DOI: 10.3389/fonc.2022.879167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
3DCRT and IMRT out-of-field doses in pediatric patients were compared using Monte Carlo simulations with treatment planning system calculations and measurements. Purpose Out-of-field doses are given to healthy tissues, which may allow the development of second tumors. The use of IMRT in pediatric patients has been discussed, as it leads to a "bath" of low doses to large volumes of out-of-field organs and tissues. This study aims to compare out-of-field doses in pediatric patients comparing IMRT and 3DCRT techniques using measurements, Monte Carlo (MC) simulations, and treatment planning system (TPS) calculations. Materials and methods A total dose of 54 Gy was prescribed to a PTV in the brain of a pediatric anthropomorphic phantom, for both techniques. To assess the out-of-field organ doses for both techniques, two treatment plans were performed with the 3DCRT and IMRT techniques in TPS. Measurements were carried out in a LINAC using a pediatric anthropomorphic phantom and thermoluminescent dosimeters to recreate the treatment plans, previously performed in the TPS. A computational model of a LINAC, the associated multileaf collimators, and a voxelized pediatric phantom implemented in the Monte Carlo N-Particle 6.1 computer program were also used to perform MC simulations of the out-of-field organ doses, for both techniques. Results The results obtained by measurements and MC simulations indicate a significant increase in dose using the IMRT technique when compared to the 3DCRT technique. More specifically, measurements show higher doses with IMRT, namely, in right eye (13,041 vs. 593 mGy), left eye (6,525 vs. 475 mGy), thyroid (79 vs. 70 mGy), right lung (37 vs. 28 mGy), left lung (27 vs. 20 mGy), and heart (31 vs. 25 mGy). The obtained results indicate that out-of-field doses can be seriously underestimated by TPS. Discussion This study presents, for the first time, out-of-field dose measurements in a realistic scenario and calculations for IMRT, centered on a voxelized pediatric phantom and an MC model of a medical LINAC, including MLC with log file-based simulations. The results pinpoint significant discrepancies in out-of-field doses for the two techniques and are a cause of concern because TPS calculations cannot accurately predict such doses. The obtained doses may presumably increase the risk of development of second tumors.
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Affiliation(s)
- Ana Cravo Sá
- Radiation Protection and Safety Group, Centro de Ciências e Tecnologias Nucleares (C2TN), Bobadela, Portugal
- Diagnostic, Therapeutic and Public Health Sciences Department, Escola Superior de Tecnologia da Saúde de Lisboa (ESTeSL), Lisbon, Portugal
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| | - Andreia Barateiro
- Radiotherapy Department, Portuguese Institute of Oncology Francisco Gentil, Lisbon, Portugal
| | - Bryan P. Bednarz
- Department of Medical Physics, Wisconsin Institutes for Medical Research, University of Wisconsin Hospital and Clinics, Madison, WI, United States
| | - Pedro Almeida
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| | - Pedro Vaz
- Radiation Protection and Safety Group, Centro de Ciências e Tecnologias Nucleares (C2TN), Bobadela, Portugal
| | - Tiago Madaleno
- Radiotherapy Department, Portuguese Institute of Oncology Francisco Gentil, Lisbon, Portugal
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Nguenha D, Acacio S, Murias-Closas A, Ramanlal N, Saavedra B, Karajeanes E, Mudumane B, Mambuque E, Gomes N, Losada I, Oliveras L, Naueia E, Sterling TR, Amorim G, Moon TD, Menéndez C, Vaz P, López-Varela E, Garcia-Basteiro AL. Prevalence and clinical characteristics of pulmonary TB among pregnant and post-partum women. Int J Tuberc Lung Dis 2022; 26:641-649. [PMID: 35768920 DOI: 10.5588/ijtld.21.0567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING: Antenatal care (ANC) and postpartum care (PPC) clinic in Manhiça District, Mozambique.OBJECTIVE: To estimate the prevalence of TB among pregnant and post-partum women and describe the clinical characteristics of the disease in a rural area of Southern Mozambique.METHODS: We conducted a cross-sectional TB prevalence study among pregnant and post-partum women recruited from September 2016 to March 2018 at the Manhiça Health Care Center (MHC). We recruited two independent cohorts of women consecutively presenting for routine pregnancy or post-partum follow-up visits.RESULTS: A total of 1,980 women from the ANC clinic and 1,010 from the PPC clinic were enrolled. We found a TB prevalence of 505/100,000 (95% CI: 242-926) among pregnant women and 297/100,000 (95% CI: 61-865) among post-partum women. Among HIV-positive pregnant women, TB prevalence was 1,626/100,000 (95% CI: 782-2,970) and among postpartum HIV-positive women, TB prevalence was 984/100,000 (95% CI: 203-2,848).CONCLUSIONS: The burden of TB was not higher in postpartum women than in pregnant women. Most TB cases were detected in HIV-positive women. TB screening and diagnostic testing among pregnant and postpartum women attending ANC and PPC clinics in Manhiça District is acceptable and feasible.
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Affiliation(s)
- D Nguenha
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique
| | - S Acacio
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique
| | - A Murias-Closas
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - N Ramanlal
- Fundação Ariel Glaser contra o SIDA Pediátrico, Maputo, Mozambique
| | - B Saavedra
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique, ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - E Karajeanes
- Fundação Ariel Glaser contra o SIDA Pediátrico, Maputo, Mozambique
| | - B Mudumane
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique
| | - E Mambuque
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique
| | - N Gomes
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique
| | - I Losada
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - L Oliveras
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain, Agència de Salut Pública de Barcelona, Barcelona, Spain, Institut d´Investigació Biomèdica Sant Pau, Barcelona, Spain
| | - E Naueia
- Fundação Ariel Glaser contra o SIDA Pediátrico, Maputo, Mozambique
| | - T R Sterling
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA, Vanderbilt Tuberculosis Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - G Amorim
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - T D Moon
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA, Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN, USA
| | - C Menéndez
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique, ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - P Vaz
- Fundação Ariel Glaser contra o SIDA Pediátrico, Maputo, Mozambique
| | - E López-Varela
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique, ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - A L Garcia-Basteiro
- Centro de Investigação em Saúde de Manhiça (CISM), Maputo, Mozambique, ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain, Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain
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Di Maria S, Vaz P. Letter response relatively to the paper entitled: Assessment of the uterine dose in digital mammography and digital breast tomosynthesis. Radiography (Lond) 2022; 28:871. [PMID: 35307249 DOI: 10.1016/j.radi.2022.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 10/18/2022]
Affiliation(s)
- S Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066 Bobadela LRS, Portugal.
| | - P Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066 Bobadela LRS, Portugal
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Babiano-Suarez V, Balibrea-Correa J, Caballero-Ontanaya L, Domingo-Pardo C, Ladarescu I, Lerendegui-Marco J, Tain JL, Calviño F, Casanovas A, Tarifeño-Saldivia A, Guerrero C, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Billowes J, Bosnar D, Brown A, Busso M, Caamaño M, Calviani M, Cano-Ott D, Cerutti F, Chiaveri E, Colonna N, Cortés G, CortésGiraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domínguez B, Ferrari A, Finocchiaro P, Furman V, Göbel K, Garg R, Gawlik-Ramięga A, Gilardoni S, Gonçalves IF, González-Romero E, Gunsing F, Harada H, Heinitz S, Heyse J, Jenkins DG, Junghans A, Käppeler F, Kadi Y, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Lederer-Woods C, Leeb H, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Persanti L, Petrone C, Pirovano E, Porras I, Praena J, Quesada JM, Ramos-Doval D, Rauscher T, Reifarth R, Rochman D, Romanets Y, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin NV, Sprung P, Stamatopoulos A, Tagliente G, Tassan-Got L, Thomas T, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright T, Žugec P. First 80Se(n, γ) cross section measurement with high resolution in the full stellar energy range 1 eV - 100 keV and its astrophysical implications for the s-process. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226011026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Most elements heavier than iron have been generated in the stellar media by means of neutron capture reactions, approximately half are produced by the slow neutron capture or s-process. Radiative neutron capture cross section measurements are of fundamental importance for the study of this mechanism. In this contribution we present a brief summary on the measurement and results for the 80Se(n,γ) cross-section. The experiment was carried out at CERN n_TOF EAR1 via the time of flight (ToF) technique, using four C6D6 scintillation detectors with very fast response. More than a hundred new resonances have been analyzed for the first time with a high accuracy. The MACS obtained at kT = 8 keV is 36% smaller than the recommended value in KADo-NiS. Some of the astrophysical implications of this result are elucidated in this contribution.
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Moreno B, Vaz P, Melo B, Cunha M, Vaz R. Knee Dislocation With Vascular and Nerve Injury in a Professional Football Player: Return to Play. Cureus 2022; 14:e21607. [PMID: 35106263 PMCID: PMC8789321 DOI: 10.7759/cureus.21607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2022] [Indexed: 12/02/2022] Open
Abstract
Traumatic knee dislocations are serious and complex injuries, defined as clinical and/or radiological loss of tibiofemoral congruence, which may represent real emergencies to the integrity of the affected limb. This lesion is responsible for multi-ligament tears but the most serious possible complications are related to vascular and peripheral nerve injuries. Recent studies show that surgical treatment has better functional results and higher return rates to sports practice compared to conservative treatment. However, there is still no consensus on the ideal surgical technique and the timing of surgery. After conservative management or surgical treatment, rehabilitation treatment plays a key role in the recovery process. There are few studies evaluating the return to competition after traumatic knee dislocation and those athletes who return have difficulty reaching the pre-injury level. Here, we report the case of a professional football player who suffered a traumatic knee dislocation, with multiple ligament tears associated with vascular and neurological damage. Three hours after the initial lesion a double interposition bypass was done with the great saphenous vein, returning flow distally. It was decided not to perform ligament surgery. Two years after a long and intense rehabilitation program the athlete successfully returned to competition.
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Cardoso T, Rodrigues PP, Nunes C, Almeida M, Cancela J, Rosa F, Rocha-Pereira N, Ferreira I, Seabra-Pereira F, Vaz P, Carneiro L, Andrade C, Davis J, Marçal A, Friedman ND. Prospective international validation of the predisposition, infection, response and organ dysfunction (PIRO) clinical staging system among intensive care and general ward patients. Ann Intensive Care 2021; 11:180. [PMID: 34950977 PMCID: PMC8702585 DOI: 10.1186/s13613-021-00966-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 12/04/2021] [Indexed: 11/17/2022] Open
Abstract
Background Stratifying patients with sepsis was the basis of the predisposition, infection, response and organ dysfunction (PIRO) concept, an attempt to resolve the heterogeneity in treatment response. The purpose of this study is to perform an independent validation of the PIRO staging system in an international cohort and explore its utility in the identification of patients in whom time to antibiotic treatment is particularly important. Methods Prospective international cohort study, conducted over a 6-month period in five Portuguese hospitals and one Australian institution. All consecutive adult patients admitted to selected wards or the intensive care, with infections that met the CDC criteria for lower respiratory tract, urinary, intra-abdominal and bloodstream infections were included. Results There were 1638 patients included in the study. Patients who died in hospital presented with a higher PIRO score (10 ± 3 vs 8 ± 4, p < 0.001). The observed mortality was 3%, 15%, 24% and 34% in stage I, II, III and IV, respectively, which was within the predicted intervals of the original model, except for stage IV patients that presented a lower mortality. The hospital survival rate was 84%. The application of the PIRO staging system to the validation cohort resulted in a positive predictive value of 97% for stage I, 91% for stage II, 85% for stage III and 66% for stage IV. The area under the receiver operating characteristics curve (AUROC) was 0.75 for the all cohort and 0.70 if only patients with bacteremia were considered. Patients in stage III and IV who did not have antibiotic therapy administered within the desired time frame had higher mortality rate than those who have timely administration of antibiotic. Conclusions To our knowledge, this is the first external validation of this PIRO staging system and it performed well on different patient wards within the hospital and in different types of hospitals. Future studies could apply the PIRO system to decision-making about specific therapeutic interventions and enrollment in clinical trials based on disease stage. Supplementary Information The online version contains supplementary material available at 10.1186/s13613-021-00966-7.
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Affiliation(s)
- T Cardoso
- Intensive Care Unit (UCIP) and Hospital Infection Control Committee, Hospital de Santo António, Oporto University Hospital Center, University of Porto, Largo Prof. Abel Salazar, 4099-001, Porto, Portugal.
| | - P P Rodrigues
- Department of Community Medicine, Information and Health Decision Sciences & CINTESIS, Faculty of Medicine, University of Porto, Rua Dr. Plácido Costa, s/n, 4200-450, Porto, Portugal
| | - C Nunes
- Intensive Care Unit and Hospital Infection Control Committee, Hospital de Bragança, Northeastern Local Health Unit, Av. Abade Baçal, 5301-852, Bragança, Portugal
| | - M Almeida
- Neurocritical Care Unit and Hospital Infection Control Committee, Hospital de São Marcos, Sete Fontes - São Vitor, 4710-243, Braga, Portugal.,Intensive Care Unit (UCIP), Hospital de Santo António, Oporto University Hospital Center, Largo Prof. Abel Salazar, 4099-001, Porto, Portugal
| | - J Cancela
- Internal Medicine Department, Hospital Pedro Hispano, Matosinhos Local Health Unit, R. Dr. Eduardo Torres, Sra. da Hora, Portugal
| | - F Rosa
- Internal Medicine Department, Hospital Pedro Hispano, Matosinhos Local Health Unit, R. Dr. Eduardo Torres, Sra. da Hora, Portugal
| | - N Rocha-Pereira
- Infectious Diseases Department, São João Hospital Center, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - I Ferreira
- Internal Medicine Department, Hospital de Santo António, Oporto University Hospital Center, Largo Prof. Abel Salazar, 4099-001, Porto, Portugal
| | - F Seabra-Pereira
- Intensive Care Unit (UCIP), Hospital de Santo António, Oporto University Hospital Center, Largo Prof. Abel Salazar, 4099-001, Porto, Portugal.,Intensive Care Unit and Internal Medicine Department, Hospital da Prelada, Rua de Sarmento de Beires, 4250-449, Porto, Portugal
| | - P Vaz
- Internal Medicine Department and Hospital Infection Control Committee, Hospital de Bragança, Northeastern Local Health Unit, Av. Abade Baçal, 5301-852, Bragança, Portugal
| | - L Carneiro
- Internal Medicine Department, Hospital Pedro Hispano, Matosinhos Local Health Unit, R. Dr. Eduardo Torres, Sra. da Hora, Portugal
| | - C Andrade
- Internal Medicine Department, Hospital Pedro Hispano, Matosinhos Local Health Unit, R. Dr. Eduardo Torres, Sra. da Hora, Portugal.,Internal Medicine Department, Hospital de Santo António, Oporto University Hospital Center, Largo Prof. Abel Salazar, 4099-001, Porto, Portugal
| | - J Davis
- Department of Renal Medicine, Barwon Health, Geelong, VIC, 3220, Australia
| | - A Marçal
- Internal Medicine Department, Hospital Pedro Hispano, Matosinhos Local Health Unit, R. Dr. Eduardo Torres, Sra. da Hora, Portugal.,Internal Medicine Department, Hospital de Santo António, Oporto University Hospital Center, Largo Prof. Abel Salazar, 4099-001, Porto, Portugal
| | - N D Friedman
- Department of Infectious Diseases, Barwon Health, Geelong, VIC, 3220, Australia
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Cepeda Martins AR, Di Maria S, Afonso J, Pereira M, Pereira J, Vaz P. Assessment of the uterine dose in digital mammography and digital breast tomosynthesis. Radiography (Lond) 2021; 28:333-339. [PMID: 34565679 DOI: 10.1016/j.radi.2021.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Digital Mammography (DM-2D) and more recently Digital Breast Tomosynthesis (DBT), are two of the most effective imaging modalities for breast cancer detection, often used in screening programmes. It may happen that exams using these two imaging modalities are inadvertently performed to pregnant women. The objective of this study is to assess the dose in the uterus due to DM-2D and DBT exams, according to two main irradiation scenarios: in the 1st scenario the exposure parameters were pre-selected directly by the imaging system, while in the 2nd scenario, the maximum exposure parameters were chosen. METHODS The mammography equipment used was a Siemens Mammomat Inspiration. A physical anthropomorphic phantom, PMMA plates (simulating a breast thickness of 6 cm) and thermoluminescent dosimeters (TLDs) were used to measure entrance air kerma values on the phantom's breast and abdomen in order to successively estimate the mean glandular dose (MGD) and the dose in the uterus. For the two irradiation scenarios chosen, two-breast imaging modalities were selected: 1) DBT in Cranio-Caudal (CC) view (with 28 kV and 160 mAs as exposure parameters), 2) DBT and DM in Medio Lateral-Oblique (MLO) and CC views (with 34 kV and 250 mAs as exposure parameters). RESULTS In the 1st scenario, the TLD measurements did not detect significant dose values in the abdomen whereas the MGD estimated using the D.R. Dance model was in close agreement with data available in the literature. In the 2nd scenario, there was no significant difference in MGD estimation between the different views, whereas the air kerma values in the abdomen (in DBT mode, CC and MLO) were 0.049 mGy and 0.004 mGy respectively. In CC DM-2D mode the abdomen air kerma value was 0.026 mGy, with no significant detected value in MLO view. CONCLUSIONS For the dose in the uterus, the obtained values seem to indicate that DM-2D and DBT examinations inadvertently performed during pregnancy do not pose a significant radiological risk, even considering the case of overexposure in both breasts. IMPLICATIONS FOR PRACTICE The accurate knowledge of the doses in DM-2D and DBT will contribute to raise the awareness among medical practitioners involved in breast imaging empowering them to provide accurate information about dose levels in the uterus, improving their radiation risk communication skills and consequently helping to reduce the anxiety of pregnant women undergoing this type of examinations.
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Affiliation(s)
- A R Cepeda Martins
- Inspeção Geral da Agricultura, do Mar, do Ambiente, e do Ordenamento do Territorio (IGAMOT), Seção Radiações Ionizantes, Rua de O Seculo, N.51, 1200-433, Lisbon, Portugal
| | - S Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal.
| | - J Afonso
- Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
| | - M Pereira
- Agência Portuguesa do Ambiente, Departamento de Emergências e Proteção Radiológica, Divisão de Autorização e Segurança Nuclear, Rua da Murgueira 9 - Zambujal - Alfragide, 2610-124, Amadora, Portugal
| | - J Pereira
- Agência Portuguesa do Ambiente, Departamento de Emergências e Proteção Radiológica, Divisão de Autorização e Segurança Nuclear, Rua da Murgueira 9 - Zambujal - Alfragide, 2610-124, Amadora, Portugal
| | - P Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
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Pedro B, Guedes L, André R, Gaspar H, Vaz P, Ascensão L, Melo R, Luísa Serralheiro M. Undaria pinnatifida (U. pinnatifida) bioactivity: Antioxidant, gastro-intestinal motility, cholesterol biosynthesis and liver cell lines proteome. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104567] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Marques L, Vale A, Vaz P. State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios. Sensors (Basel) 2021; 21:s21041051. [PMID: 33557104 PMCID: PMC7913838 DOI: 10.3390/s21041051] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/29/2021] [Accepted: 01/31/2021] [Indexed: 11/26/2022]
Abstract
In the last decade, the development of more compact and lightweight radiation detection systems led to their application in handheld and small unmanned systems, particularly air-based platforms. Examples of improvements are: the use of silicon photomultiplier-based scintillators, new scintillating crystals, compact dual-mode detectors (gamma/neutron), data fusion, mobile sensor networks, cooperative detection and search. Gamma cameras and dual-particle cameras are increasingly being used for source location. This study reviews and discusses the research advancements in the field of gamma-ray and neutron measurements using mobile radiation detection systems since the Fukushima nuclear accident. Four scenarios are considered: radiological and nuclear accidents and emergencies; illicit traffic of special nuclear materials and radioactive materials; nuclear, accelerator, targets, and irradiation facilities; and naturally occurring radioactive materials monitoring-related activities. The work presented in this paper aims to: compile and review information on the radiation detection systems, contextual sensors and platforms used for each scenario; assess their advantages and limitations, looking prospectively to new research and challenges in the field; and support the decision making of national radioprotection agencies and response teams in respect to adequate detection system for each scenario. For that, an extensive literature review was conducted.
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Affiliation(s)
- Luís Marques
- Centro de Investigação da Academia da Força Aérea, Academia da Força Aérea, Instituto Universitário Militar, Granja do Marquês, 2715-021 Pêro Pinheiro, Portugal
- Correspondence:
| | - Alberto Vale
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal;
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Bobadela, Portugal;
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Figueiredo D, Fernandes C, Silva F, Palma E, Raposinho P, Belchior A, Vaz P, Paulo A. Synthesis and Biological Evaluation of 99mTc(I) Tricarbonyl Complexes Dual-Targeted at Tumoral Mitochondria. Molecules 2021; 26:441. [PMID: 33467760 PMCID: PMC7830118 DOI: 10.3390/molecules26020441] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/01/2021] [Accepted: 01/11/2021] [Indexed: 12/04/2022] Open
Abstract
For effective Auger therapy of cancer, the Auger-electron emitters must be delivered to the tumor cells in close proximity to a radiosensitive cellular target. Nuclear DNA is considered the most relevant target of Auger electrons to have augmented radiotoxic effects and significant cell death. However, there is a growing body of evidence that other targets, such as the mitochondria, could be relevant subcellular targets in Auger therapy. Thus, we developed dual-targeted 99mTc(I) tricarbonyl complexes containing a triphenylphosphonium (TPP) moiety to promote accumulation of 99mTc in the mitochondria, and a bombesin peptide to provide specificity towards the gastrin releasing peptide receptor (GRPr) overexpressed in prostate cancer cells. The designed dual-targeted complex, 99mTc-TPP-BBN, is efficiently internalized by human prostate cancer PC3 cells through a specific GRPr-mediated mechanism of uptake. Moreover, the radioconjugate provided an augmented accumulation of 99mTc in the mitochondria of the target tumor cells, most probably following its intracellular cleavage by cathepsin B. In addition, 99mTc-TPP-BBN showed an enhanced ability to reduce the survival of PC3 cells, in a dose-dependent manner.
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Affiliation(s)
- Diogo Figueiredo
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
| | - Célia Fernandes
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
- DECN—Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Francisco Silva
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
| | - Elisa Palma
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
| | - Paula Raposinho
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
- DECN—Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Ana Belchior
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
| | - Pedro Vaz
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
- DECN—Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - António Paulo
- C2TN Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; (D.F.); (F.S.); (E.P.); (P.R.); (A.B.); (P.V.)
- DECN—Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
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António D, Di Maria S, Matela N, Vieira S, Vaz P. Dose assessment and reconstruction algorithm optimization in simultaneous breast and lung CT imaging. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Guerrero C, Lerendegui-Marco J, Paul M, Tessler M, Heinitz S, Domingo-Pardo C, Cristallo S, Dressler R, Halfon S, Kivel N, Köster U, Maugeri EA, Palchan-Hazan T, Quesada JM, Rochman D, Schumann D, Weissman L, Aberle O, Amaducci S, Andrzejewski J, Audouin L, Bécares V, Bacak M, Balibrea J, Barak A, Barbagallo M, Barros S, Bečvář F, Beinrucker C, Berkovits D, Berthoumieux E, Billowes J, Bosnar D, Brugger M, Buzaglo Y, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Dafna H, Damone A, Diakaki M, Dietz M, Dupont E, Durán I, Eisen Y, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Gunsing F, Harada H, Heftrich T, Heyse J, Hirsh T, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kaizer B, Katabuchi T, Kavrigin P, Ketlerov V, Khryachkov V, Kijel D, Kimura A, Kokkoris M, Kriesel A, Krtička M, Leal-Cidoncha E, Lederer-Woods C, Leeb H, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Manna A, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Mendoza E, Mengoni A, Milazzo PM, Millán-Callado MA, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Piersanti L, Porras I, Praena J, Rajeev K, Rauscher T, Reifarth R, Rodríguez-González T, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Shor A, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weigand M, Weiss C, Wolf C, Woods PJ, Wright T, Žugec P. Neutron Capture on the s-Process Branching Point ^{171}Tm via Time-of-Flight and Activation. Phys Rev Lett 2020; 125:142701. [PMID: 33064503 DOI: 10.1103/physrevlett.125.142701] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 07/02/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
The neutron capture cross sections of several unstable nuclides acting as branching points in the s process are crucial for stellar nucleosynthesis studies. The unstable ^{171}Tm (t_{1/2}=1.92 yr) is part of the branching around mass A∼170 but its neutron capture cross section as a function of the neutron energy is not known to date. In this work, following the production for the first time of more than 5 mg of ^{171}Tm at the high-flux reactor Institut Laue-Langevin in France, a sample was produced at the Paul Scherrer Institute in Switzerland. Two complementary experiments were carried out at the neutron time-of-flight facility (n_TOF) at CERN in Switzerland and at the SARAF liquid lithium target facility at Soreq Nuclear Research Center in Israel by time of flight and activation, respectively. The result of the time-of-flight experiment consists of the first ever set of resonance parameters and the corresponding average resonance parameters, allowing us to make an estimation of the Maxwellian-averaged cross sections (MACS) by extrapolation. The activation measurement provides a direct and more precise measurement of the MACS at 30 keV: 384(40) mb, with which the estimation from the n_TOF data agree at the limit of 1 standard deviation. This value is 2.6 times lower than the JEFF-3.3 and ENDF/B-VIII evaluations, 25% lower than that of the Bao et al. compilation, and 1.6 times larger than the value recommended in the KADoNiS (v1) database, based on the only previous experiment. Our result affects the nucleosynthesis at the A∼170 branching, namely, the ^{171}Yb abundance increases in the material lost by asymptotic giant branch stars, providing a better match to the available pre-solar SiC grain measurements compared to the calculations based on the current JEFF-3.3 model-based evaluation.
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Affiliation(s)
- C Guerrero
- Universidad de Sevilla, Seville, Spain
- Centro Nacional de Aceleradores (CNA) (Universidad de Sevilla-Junta de Andalucía-CSIC), Seville, Spain
| | | | - M Paul
- Hebrew University, Jerusalem, Israel
| | - M Tessler
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - S Heinitz
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - C Domingo-Pardo
- Instituto de Física Corpuscular (CSIC-University of Valencia), Valencia, Spain
| | - S Cristallo
- INAF-Osservatorio Astronomico d'Abruzzo, Teramo, Italy
- INFN Sezione Perugia, Perugia, Italy
| | - R Dressler
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - S Halfon
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - N Kivel
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - U Köster
- Institut Laue-Langevin ILL, Grenoble, France
| | - E A Maugeri
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | | | | | - D Rochman
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - D Schumann
- Paul Scherrer Institut (PSI), Villigen, Switzerland
| | - L Weissman
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - O Aberle
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - S Amaducci
- INFN Laboratori Nazionali del Sud, Catania, Italy
| | | | - L Audouin
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, Orsay Cedex, France
| | - V Bécares
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - M Bacak
- Technische Universität Wien, Vienna, Austria
| | - J Balibrea
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - A Barak
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - M Barbagallo
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - S Barros
- Instituto Superior Técnico, Lisbon, Portugal
| | - F Bečvář
- Charles University, Prague, Czech Republic
| | | | - D Berkovits
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - E Berthoumieux
- CEA Irfu, Université Paris-Saclay, Gif-sur-Yvette, France
| | - J Billowes
- University of Manchester, Manchester, United Kingdom
| | - D Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - M Brugger
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - Y Buzaglo
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - M Caamaño
- University of Santiago de Compostela, Santiago de Conpostela, Spain
| | - F Calviño
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | - M Calviani
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - D Cano-Ott
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - R Cardella
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - A Casanovas
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | - D M Castelluccio
- Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - F Cerutti
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - Y H Chen
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, Orsay Cedex, France
| | - E Chiaveri
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - N Colonna
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - G Cortés
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | | | - L Cosentino
- INFN Laboratori Nazionali del Sud, Catania, Italy
| | - H Dafna
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - A Damone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
- Dipartimento di Fisica, Università degli Studi di Bari, Bari, Italy
| | - M Diakaki
- CEA Irfu, Université Paris-Saclay, Gif-sur-Yvette, France
| | - M Dietz
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
| | - E Dupont
- CEA Irfu, Université Paris-Saclay, Gif-sur-Yvette, France
| | - I Durán
- University of Santiago de Compostela, Santiago de Conpostela, Spain
| | - Y Eisen
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | | | - A Ferrari
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - P Ferreira
- Instituto Superior Técnico, Lisbon, Portugal
| | | | - V Furman
- Joint Institute for Nuclear Research (JINR), Dubna, Russia
| | - K Göbel
- Goethe University Frankfurt, Seville, Germany
| | - A R García
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - A Gawlik
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - T Glodariu
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Jerusalem, Romania
| | | | - E González-Romero
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - A Goverdovski
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| | | | - F Gunsing
- Institut Laue-Langevin ILL, Grenoble, France
- CEA Irfu, Université Paris-Saclay, Gif-sur-Yvette, France
| | - H Harada
- Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
| | - T Heftrich
- Goethe University Frankfurt, Seville, Germany
| | - J Heyse
- Universitat Politècnica de Catalunya, Barcelona, Spain
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
| | - T Hirsh
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | | | - E Jericha
- Technische Universität Wien, Vienna, Austria
| | - F Käppeler
- Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Y Kadi
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - B Kaizer
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | | | - P Kavrigin
- Technische Universität Wien, Vienna, Austria
| | - V Ketlerov
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| | - V Khryachkov
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| | - D Kijel
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - A Kimura
- Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
| | - M Kokkoris
- National Technical University of Athens, Athens, Greece
| | - A Kriesel
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - M Krtička
- Charles University, Prague, Czech Republic
| | - E Leal-Cidoncha
- University of Santiago de Compostela, Santiago de Conpostela, Spain
| | - C Lederer-Woods
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
| | - H Leeb
- Technische Universität Wien, Vienna, Austria
| | - S Lo Meo
- Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - S J Lonsdale
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
| | - R Losito
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - D Macina
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - A Manna
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
| | | | - T Martínez
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - C Massimi
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
| | - P Mastinu
- Istituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
| | - M Mastromarco
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - F Matteucci
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
- Dipartimento di Astronomia, Università di Trieste, Trieste, Italy
| | - E Mendoza
- Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - A Mengoni
- Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
| | - P M Milazzo
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
| | - M A Millán-Callado
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, Orsay Cedex, France
| | - F Mingrone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - M Mirea
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Jerusalem, Romania
| | - S Montesano
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - A Musumarra
- INFN Laboratori Nazionali del Sud, Catania, Italy
- Dipartimento di Fisica e Astronomia, Università di Catania, Catania, Italy
| | - R Nolte
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
| | - A Oprea
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Jerusalem, Romania
| | - N Patronis
- University of Ioannina, Ioannina, Greece
| | - A Pavlik
- University of Vienna, Faculty of Physics, Vienna, Austria
| | | | - L Piersanti
- INAF-Osservatorio Astronomico d'Abruzzo, Teramo, Italy
| | - I Porras
- University of Granada, Granada, Spain
| | - J Praena
- Universidad de Sevilla, Seville, Spain
- University of Granada, Granada, Spain
| | - K Rajeev
- Bhabha Atomic Research Centre (BARC), Mumbai, India
| | - T Rauscher
- Centre for Astrophysics Research, University of Hertfordshire, Hatfield, United Kingdom
- Department of Physics, University of Basel, Basel, Switzerland
| | - R Reifarth
- Goethe University Frankfurt, Seville, Germany
| | - T Rodríguez-González
- Universidad de Sevilla, Seville, Spain
- Centro Nacional de Aceleradores (CNA) (Universidad de Sevilla-Junta de Andalucía-CSIC), Seville, Spain
| | - P C Rout
- Bhabha Atomic Research Centre (BARC), Mumbai, India
| | - C Rubbia
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - J A Ryan
- University of Manchester, Manchester, United Kingdom
| | - M Sabaté-Gilarte
- Universidad de Sevilla, Seville, Spain
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - A Saxena
- Bhabha Atomic Research Centre (BARC), Mumbai, India
| | | | - S Schmidt
- Goethe University Frankfurt, Seville, Germany
| | - A Shor
- Soreq Nuclear Research Center (SNRC), Yavne, Israel
| | - P Sedyshev
- Joint Institute for Nuclear Research (JINR), Dubna, Russia
| | - A G Smith
- University of Manchester, Manchester, United Kingdom
| | | | - G Tagliente
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - J L Tain
- Instituto de Física Corpuscular (CSIC-University of Valencia), Valencia, Spain
| | | | - L Tassan-Got
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, Orsay Cedex, France
| | - A Tsinganis
- National Technical University of Athens, Athens, Greece
| | - S Valenta
- Charles University, Prague, Czech Republic
| | - G Vannini
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
| | - V Variale
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
| | - P Vaz
- Instituto Superior Técnico, Lisbon, Portugal
| | - A Ventura
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
| | - V Vlachoudis
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
| | - R Vlastou
- National Technical University of Athens, Athens, Greece
| | - A Wallner
- Australian National University, Canberra, Australia
| | - S Warren
- University of Manchester, Manchester, United Kingdom
| | - M Weigand
- Goethe University Frankfurt, Seville, Germany
| | - C Weiss
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- Technische Universität Wien, Vienna, Austria
| | - C Wolf
- Goethe University Frankfurt, Seville, Germany
| | - P J Woods
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
| | - T Wright
- University of Manchester, Manchester, United Kingdom
| | - P Žugec
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
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Manna A, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano VS, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calvi F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Coséntino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Goncalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtiička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada J, Ramos D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith A, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeno-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Setup for the measurement of the 235U(n, f) cross section relative to n-p scattering up to 1 GeV. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The neutron induced fission of 235U is extensively used as a reference for neutron fluence measurements in various applications, ranging from the investigation of the biological effectiveness of high energy neutrons, to the measurement of high energy neutron cross sections of relevance for accelerator driven nuclear systems. Despite its widespread use, no data exist on neutron induced fission of 235U above 200 MeV. The neutron facility n_TOF offers the possibility to improve the situation. The measurement of 235U(n,f) relative to the differential n-p scattering cross-section, was carried out in September 2018 with the aim of providing accurate and precise cross section data in the energy range from 10 MeV up to 1 GeV. In such measurements, Recoil Proton Telescopes (RPTs) are used to measure the neutron flux while the fission events are detected and counted with dedicated detectors. In this paper the measurement campaign and the experimental set-up are illustrated.
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22
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Terranova N, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Monte Carlo simulations and n-p differential scattering data measured with Proton Recoil Telescopes. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The neutron-induced fission cross section of 235U, a standard at thermal energy and between 0.15 MeV and 200 MeV, plays a crucial role in nuclear technology applications. The long-standing need of improving cross section data above 20 MeV and the lack of experimental data above 200 MeV motivated a new experimental campaign at the n_TOF facility at CERN. The measurement has been performed in 2018 at the experimental area 1 (EAR1), located at 185 m from the neutron-producing target (the experiment is presented by A. Manna et al. in a contribution to this conference). The 235U(n,f) cross section from 20 MeV up to about 1 GeV has been measured relative to the 1H(n,n)1H reaction, which is considered the primary reference in this energy region. The neutron flux impinging on the 235U sample (a key quantity for determining the fission events) has been obtained by detecting recoil protons originating from n-p scattering in a C2H4 sample. Two Proton Recoil Telescopes (PRT), consisting of several layers of solid-state detectors and fast plastic scintillators, have been located at proton scattering angles of 25.07° and 20.32°, out of the neutron beam. The PRTs exploit the ΔE-E technique for particle identification, a basic requirement for the rejection of charged particles from neutron-induced reactions in carbon. Extensive Monte Carlo simulations were performed to characterize proton transport through the different slabs of silicon and scintillation detectors, to optimize the experimental set-up and to deduce the efficiency of the whole PRT detector. In this work we compare measured data collected with the PRTs with a full Monte Carlo simulation based on the Geant-4 toolkit.
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Belchior A, Di Maria S, Fernandes C, Vaz P, Paulo A, Raposinho P. Radiobiological and dosimetric assessment of DNA-intercalated 99mTc-complexes bearing acridine orange derivatives. EJNMMI Res 2020; 10:79. [PMID: 32661612 PMCID: PMC7359215 DOI: 10.1186/s13550-020-00663-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 06/25/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Recently, a new family of 99mTc(I)-tricarbonyl complexes bearing an acridine orange (AO) DNA targeting unit and different linkers between the Auger emitter (99mTc) and the AO moiety was evaluated for Auger therapy. Among them, 99mTc-C3 places the corresponding radionuclide at a shortest distance to DNA and produces important double strand breaks (DSB) yields in plasmid DNA providing the first evidence that 99mTc can efficiently induce DNA damage when well positioned to the double helix. Here in, we have extended the studies to human prostate cancer PC3 cells using the 99mTc-C3 and 99mTc-C5 complexes, aiming to assess how the distance to DNA influences the radiation-induced biological effects in this tumoral cell line, namely, in which concerns early and late damage effects. RESULTS Our results highlight the limited biological effectiveness of Auger electrons, as short path length radiation, with increasing distances to DNA. The evaluation of the radiation-induced biological effects was complemented with a comparative microdosimetric study based on intracellular dose values. The comparative study, between MIRD and Monte Carlo (MC) methods used to assess the cellular doses, revealed that efforts should be made in order to standardize the bioeffects modeling for DNA-incorporated Auger electron emitters. CONCLUSIONS 99mTc might not be the ideal radionuclide for Auger therapy but can be useful to validate the design of new classes of Auger-electron emitting radioconjugates. In this context, our results highlight the crucial importance of the distance of Auger electron emitters to the target DNA and encourage the development of strategies for the fine tuning of the distance to DNA for other medical radionuclides (e.g., 111In or 161Tb) in order to enhance their radiotherapeutic effects within the Auger therapy of cancer.
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Affiliation(s)
- Ana Belchior
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066, Bobadela LRS, Portugal.
| | - Salvatore Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066, Bobadela LRS, Portugal
| | - Célia Fernandes
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066, Bobadela LRS, Portugal
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066, Bobadela LRS, Portugal
| | - António Paulo
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066, Bobadela LRS, Portugal
| | - Paula Raposinho
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066, Bobadela LRS, Portugal.
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Baptista M, Di Maria S, Vieira S, Pereira J, Pereira M, Vaz P. Organ dose measurements using an adult anthropomorphic phantom and risk estimation of cancer incidence from CBCT exposures. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Borbinha J, Romanets Y, Teles P, Corisco J, Vaz P, Carvalho D, Brouwer Y, Luís R, Pinto L, Vale A, Ventura R, Areias B, Reis AB, Gonçalves B. Performance Analysis of Geiger-Müller and Cadmium Zinc Telluride Sensors Envisaging Airborne Radiological Monitoring in NORM Sites. Sensors (Basel) 2020; 20:s20051538. [PMID: 32164377 PMCID: PMC7085614 DOI: 10.3390/s20051538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/26/2020] [Accepted: 03/06/2020] [Indexed: 11/16/2022]
Abstract
Radiological monitoring is fundamental for compliance with radiological protection policies in the aftermath of radiological events, such as nuclear accidents, terrorism, and out-of-commission uranium mines. An effective strategy for radiation monitoring is to use radiation detectors coupled with Unmanned Aerial Vehicles (UAVs), enabling for quicker surveillance of large areas without involving the need of human presence in the target area. The main aim of this study was to formulate the parameters for a UAV flight strategy in preparation for future field measurements using Geiger-Muller Counters (GMC) and Cadmium Zinc Telluride (CZT) spectrometers. As a proof of concept, the prepared flight strategy will be used to survey out-of-commission uranium mines in northern Portugal. Procedures to assure the calibration of the CZT and verification of the GMCs were conducted, as well as a sensitivity analysis of the sensors considering different acquisition times, distance to source, and detector response time. This article reports specific parameters, such as UAV distance to ground, time of exposition, speed, and the methodology to perform the identification and calculate the activity of possible radioactive sources. An effective flight strategy is also presented, aiming to use radiation detectors coupled with UAVs to undertake extensive monitoring of areas with enhanced levels of environmental radiation, which is of prime importance due to the lasting hazardous effects of enhanced environmental radiation in the nearby ecosystem and population.
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Affiliation(s)
- Jorge Borbinha
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7. 2695-066 Bobadela, Portugal; (Y.R.); (P.T.); (J.C.); (P.V.)
- Correspondence:
| | - Yuriy Romanets
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7. 2695-066 Bobadela, Portugal; (Y.R.); (P.T.); (J.C.); (P.V.)
| | - Pedro Teles
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7. 2695-066 Bobadela, Portugal; (Y.R.); (P.T.); (J.C.); (P.V.)
| | - José Corisco
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7. 2695-066 Bobadela, Portugal; (Y.R.); (P.T.); (J.C.); (P.V.)
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, ao km 139,7. 2695-066 Bobadela, Portugal; (Y.R.); (P.T.); (J.C.); (P.V.)
| | - Diogo Carvalho
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; (D.C.); (Y.B.); (R.L.); (L.P.); (A.V.); (B.G.)
| | - Yoeri Brouwer
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; (D.C.); (Y.B.); (R.L.); (L.P.); (A.V.); (B.G.)
| | - Raul Luís
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; (D.C.); (Y.B.); (R.L.); (L.P.); (A.V.); (B.G.)
| | - Luís Pinto
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; (D.C.); (Y.B.); (R.L.); (L.P.); (A.V.); (B.G.)
| | - Alberto Vale
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; (D.C.); (Y.B.); (R.L.); (L.P.); (A.V.); (B.G.)
| | - Rodrigo Ventura
- Institute for Systems and Robotics, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal;
| | - Bruno Areias
- Instituto de Telecomunicações, Universidade de Aveiro, 3810-193 Aveiro, Portugal; (B.A.); (A.B.R.)
| | - Andre B. Reis
- Instituto de Telecomunicações, Universidade de Aveiro, 3810-193 Aveiro, Portugal; (B.A.); (A.B.R.)
| | - Bruno Gonçalves
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal; (D.C.); (Y.B.); (R.L.); (L.P.); (A.V.); (B.G.)
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Massimi C, Aberle O, Andrzejewski J, Audouin L, Bacak M, Balibrea J, Barbagallo M, Bečvář F, Berthoumieux E, Billowes J, Bosnar D, Brown A, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Clai G, Colonna N, Console Camprini P, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Diakaki M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Gilardoni S, Glodariu T, Gonçalves IF, González-Romero E, Griesmayer E, Guerrero C, Guglielmelli A, Gunsing F, Harada H, Heinitz S, Heyse J, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kalamara A, Kavrigin P, Kimura A, Kivel N, Knapova I, Kokkoris M, Krtička M, Kurtulgil D, Leal-Cidoncha E, Lederer C, Leeb H, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Marganiec J, Martínez T, Masi A, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Mucciola R, Musumarra A, Negret A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Radeck D, Rauscher T, Reifarth R, Rocchi F, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sedyshev P, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weiss C, Woods PJ, Wright T, Žugec P. Measurement and analysis of 155,157Gd(n, γ) from thermal energy to 1 keV. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have measured the capture cross section of the 155Gd and 157Gd isotopes between 0.025 eV and 1 keV. The capture events were recorded by an array of 4 C6D6 detectors, and the capture yield was deduced exploiting the total energy detection system in combination with the Pulse Height Weighting Techniques. Because of the large cross section around thermal neutron energy, 4 metallic samples of different thickness were used to prevent problems related to self-shielding. The samples were isotopically enriched, with a cross contamination of the other isotope of less than 1.14%. The capture yield was analyzed with an R-Matrix code to describe the cross section in terms of resonance parameters. Near thermal energies, the results are significantly different from evaluations and from previous time-of-flight experiments. The data from the present measurement at n_TOF are publicly available in the experimental nuclear reaction database EXFOR.
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Barbagallo M, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté- Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Measurement of the energy-differential cross-section of the 12C(n,p) 12B and 12C(n,d) 11B reactions at the n_TOF facility at CERN. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Although the 12C(n,p)12B and 12C(n,d)11B reactions are of interest in several fields of basic and applied Nuclear Physics the present knowledge of these two cross-sections is far from being accurate and reliable, with both evaluations and data showing sizable discrepancies. As part of the challenging n_TOF program on (n,cp) nuclear reactions study, the energy differential cross-sections of the 12C(n,p)12B and 12C(n,d)11 B reactions have been measured at CERN from the reaction thresholds up to 30 MeV neutron energy. Both measurements have been recently performed at the long flight-path (185 m) experimental area of the n_TOF facility at CERN using a pure (99.95%) rigid graphite target and two silicon telescopes. In this paper an overview of the experiment is presented together with a few preliminary results.
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Bacak M, Aïche M, Bélier G, Berthoumieux E, Diakaki M, Dupont E, Gunsing F, Heyse J, Kopecky S, Krtička M, Laurent B, Leeb H, Mathieu L, Schillebeeckx P, Serot O, Taieb J, Valenta S, Vlachoudis V, Aberle O, Andrzejewski J, Audouin L, Balibrea J, Barbagallo M, Bečvář F, Billowes J, Bosnar D, Brown A, Caamaño M, Calviño F, Calviani, Cano-Ott D, Cardella R, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Domingo-Pardo C, Dressler R, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Gilardoni S, Glodariu T, Gonçalves IF, González-Romero E, Griesmayer E, Guerrero C, Harada H, Heinitz S, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kalamara A, Kavrigin P, Kimura A, Kivel N, Knapova I, Kokkoris M, Kurtulgil D, Leal-Cidoncha E, Lederer C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Marganiec J, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Radeck D, Rauscher T, Reifarth R, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schumann D, Sedyshev P, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Vannini G, Variale V, Vaz P, Ventura A, Vlastou R, Wallner A, Warren S, Weiss C, Woods PJ, Wright T, Žugec P. Preliminary results on the 233U α-ratio measurement at n_TOF. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
233U is the fissile nuclei in the Th-U fuel cycle with a particularily small neutron capture cross setion which is on average about one order of magnitude lower than its fission cross section. Hence, the measurement of the 233U(n, γ) cross section relies on a method to accurately distinguish between capture and fission γ-rays. A measurement of the 233U α-ratio has been performed at the n_TOF facility at CERN using a so-called fission tagging setup, coupling n_TOF 's Total Absorption Calorimeter with a novel fission chamber to tag the fission γ-rays. The experimental setup is described and essential parts of the analysis are discussed. Finally, a preliminary 233U α-ratio is presented.
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Chiaveri E, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown A, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Colonna N, Cortés G, Cortés-Giraldo M, Cosentino L, Cristallo S, Damone L, Davies P, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins D, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo P, Millán-Callado M, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada J, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith A, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain J, Tarifeño-Saldivia A, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods P, Wright T, Žugec P. Status and perspectives of the neutron time-of-flight facility n_TOF at CERN. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023917001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia [1], the neutron time of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for wide-energy spectrum neutron cross section measurements. Thanks to the combination of excellent neutron energy resolution and high instantaneous neutron flux available in the two experimental areas, the second of which has been constructed in 2014, n_TOF is providing a wealth of new data on neutron-induced reactions of interest for nuclear astrophysics, advanced nuclear technologies and medical applications. The unique features of the facility will continue to be exploited in the future, to perform challenging new measurements addressing the still open issues and long-standing quests in the field of neutron physics. In this document the main characteristics of the n_TOF facility and their relevance for neutron studies in the different areas of research will be outlined, addressing the possible future contribution of n_TOF in the fields of nuclear astrophysics, nuclear technologies and medical applications. In addition, the future perspectives of the facility will be described including the upgrade of the spallation target, the setup of an imaging installation and the construction of a new irradiation area.
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Oprea A, Gunsing F, Schillebeeckx P, Aberle O, Bacak M, Berthoumieux E, Cano-Ott D, Diakaki M, Dupont E, Geslot B, Glodariu T, Heyse J, Mendoza E, Negret A, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Bécares V, Babiano-Suarez V, Barbagallo M, Becčvář F, Bellia G, Billowes J, Bosnar D, Brown A, Busso M, Caamaño M, Caballero-Ontanaya L, Calviño F, Calviani M, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Dietz M, Domingo-Pardo C, Dressler R, Durán I, Eleme Z, Femández-Domínguez B, Ferrari A, Finocchiaro P, Furman V, Göbel K, Garg R, Gawlik A, Gilardoni S, Goncalves IF, González-Romero E, Guerrero C, Harada H, Heinitz S, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kimura A, Kivel N, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Nolte R, Ogállar F, Patronis N, Pavlik A, Perkowski J, Persanti L, Porras I, Praena J, Quesada JM, Radeck D, Ramos-Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schumann D, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Talip T, Tarifeño-Saldivia A, Tassan-Got L, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright T, Žugec P. Neutron capture cross section measurements of 241Am at the n_TOF facility. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Neutron capture on 241Am plays an important role in the nuclear energy production and also provides valuable information for the improvement of nuclear models and the statistical interpretation of the nuclear properties. A new experiment to measure the 241Am(n, γ) cross section in the thermal region and the first few resonances below 10 eV has been carried out at EAR2 of the n_TOF facility at CERN. Three neutron-insensitive C6D6 detectors have been used to measure the neutron-capture gamma cascade as a function of the neutron time of flight, and then deduce the neutron capture yield. Preliminary results will be presented and compared with previously obtained results at the same facility in EAR1. In EAR1 the gamma-ray background at thermal energies was about 90% of the signal while in EAR2 is up to a 25 factor much more favorable signal to noise ratio. We also extended the low energy limit down to subthermal energies. This measurement will allow a comparison with neutron capture measurements conducted at reactors and using a different experimental technique.
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Stamatopoulos A, Tsinganis A, Diakaki M, Colonna N, Kokkoris M, Vlastou R, Kalamara A, Schillebeeckx P, Tassan-Got L, Žugec P, Sabaté-Gilarte M, Patronis N, Eleme Z, Heyse J, Aberle O, Andrzejewski J, Audouin L, Bacak M, Balibrea J, Barbagallo M, Bečvář F, Berthoumieux E, Billowes J, Bosnar D, Brown A, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Domingo-Pardo C, Dressler R, Dupont E, Durán, Femandez-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Gilardoni S, Glodariu† T, Gonçalves IF, González-Romero E, Griesmayer E, Guerrero C, Gunsing F, Harada H, Heinitz S, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kavrigin P, Kimura A, Kivel N, Knapova I, Krtička M, Kurtulgil D, Leal-Cidoncha E, Lederer C, Leeb H, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Marganiec J, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Oprea A, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Radeck D, Rauscher T, Reifarth R, Rubbia C, Ryan JA, Saxena A, Schumann D, Sedyshev P, Smith AG, Sosnin NV, Tagliente G, Tain JL, Tarifeño-Saldivia A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Wallner A, Warren S, Weiss C, Woods PJ, Wright T. Study of the neutron-induced fission cross section of 237Np at CERN's n_TOF facility over a wide energy range. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023905006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Neutron-induced fission cross sections of isotopes involved in the nuclear fuel cycle are vital for the design and safe operation of advanced nuclear systems. Such experimental data can also provide additional constraints for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of fission models. In the present work, the 237Np(n,f) cross section was studied at the EAR2 vertical beam-line at CERN's n_TOF facility, over a wide range of neutron energies, from meV to MeV, using the time-of-flight technique and a set-up based on Micromegas detectors, in an attempt to provide accurate experimental data. Preliminary results in the 200 keV – 14 MeV neutron energy range as well as the experimental procedure, including a description of the facility and the data handling and analysis, will be presented.
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Mendoza E, Alcayne V, Cano-Ott D, Kimura A, Skarbeli AV, Aberle O, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bécares V, Bečvář F, Bellia G, Berthoumieux E, Billowes J, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Glodariu T, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Kadi Y, Käppeler F, Kivel N, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Matteucci F, Maugeri E, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Piersanti L, Porras I, Praena J, Quesada JM, Radeck D, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Smith AG, Sosnin N, Stamatopoulos A, Tagliente G, Tain JL, Talip Z, Tarifeño-Saldivia AE, Tassan-Got L, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Study of photon strength functions of 241Pu and 245Cm from neutron capture measurements. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have measured theγ-rays following neutron capture on240Pu and244Cm at the n_TOF facility at CERN with the Total Absorption Calorimeter (TAC) and with C6D6 organic scintillators. The TAC is made of 40 BaF2 crystals operating in coincidence and covering almost the entire solid angle. This allows to obtain information concerning the energy spectra and the multiplicity of the measured captureγ-ray cascades. Additional information is also obtained from the C6D6 detectors. We have analyzed the measured data in order to draw conclusions about the Photon Strength Functions (PSFs) of241Pu and245Cm below their neutron separation energies. The analysis has been performed by fitting the PSFs to the experimental results, using the differential evolution method, in order to find neutron capture cascades capable of reproducing at the same time a great variety of deposited energy spectra.
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Amaducci S, Aberle O, Andrzejewski J, Audouin L, Bacak M, Balibrea J, Barbagallo M, Bečvář F, Berthoumieux E, Billowes J, Bosnar D, Brown A, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Girardo MA, Cosentino L, Damone LA, Diakaki M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Gilardoni S, Glodariu T, Gonçalves IF, González-Romero E, Griesmayer E, Guerrero C, Gunsing F, Harada H, Heinitz S, Heyse J, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kalamara A, Kavrigin P, Kimura A, Kivel N, Knapova I, Kokkoris M, Krtička M, Kurtulgil D, Leal-Cidoncha E, Lederer C, Leeb H, Lerendegui-Marco J, Lo Meo S, Lonsdale SJ, Macina D, Manna A, Marganiec J, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Radeck D, Rauscher T, Reifarth R, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sedyshev P, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weiss C, Woods PJ, Wright T, Žugec P. Accurate measurement of the standard 235U(n,f) cross section from thermal to 170 keV neutron energy. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023908002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
An accurate measurement of the 235U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using 6Li(n,t)4He and 10B(n,α)7Li as references. This measurement has been carried out in order to investigate a possible overestimation of the 235U fission cross section evaluation provided by most recent libraries between 10 and 30 keV. A custom experimental apparatus based on in-beam silicon detectors has been used, and a Monte Carlo simulation in GEANT4 has been employed to characterize the setup and calculate detectors efficiency. The results evidenced the presence of an overestimation in the interval between 9 and 18 keV and the new data may be used to decrease the uncertainty of 235U(n,f) cross section in the keV region.
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Michalopoulou V, Stamatopoulos A, Vlastou R, Kokkoris M, Tsinganis A, Diakaki M, Eleme Z, Patronis N, Heyse J, Schillebeeckx P, Tassan-Got L, Barbagallo M, Colonna N, Urlass S, Macina D, Chiaveri E, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Femández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kopatch Y, Krtiička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Thomas B, Torres-Sánchez P, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Wallner A, Woods PJ, Wright TJ, Žugec P. First results of the 230Th(n,f) cross section measurements at the CERN n_TOF facility. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023905004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The study of neutron-induced reactions on actinides is of considerable importance for the design of advanced nuclear systems and alternative fuel cycles. Specifically, 230Th is produced from the α-decay of 234U as a byproduct of the 232Th/233U fuel cycle, thus the accurate knowledge of its fission cross section is strongly required. However, few experimental datasets exist in literature with large deviations among them, covering the energy range between 0.2 to 25 MeV. In addition, the study of the 230Th(n,f) cross-section is of great interest in the research on the fission process related to the structure of the fission barriers. Previous measurements have revealed a large resonance at En=715 keV and additional fine structures, but with high discrepancies among the cross-section values of these measurements. This contribution presents preliminary results of the 230Th(n,f) cross-section measurements at the CERN n_TOF facility. The high purity targets of the natural, but very rare isotope 230Th, were produced at JRC-Geel in Belgium. The measurements were performed at both experimental areas (EAR-1 and EAR-2) of the n_TOF facility, covering a very broad energy range from thermal up to at least 100 MeV. The experimental setup was based on Micromegas detectors with the 235U(n,f) and 238U(n,f) reaction cross-sections used as reference.
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Mengoni A, Damone L, Barbagallo M, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown A, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo M, Cosentino L, Cristallo S, Davies P, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins D, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Michalopoulou V, Milazzo P, Millán-Callado M, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada J, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith A, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain J, Tarifeño-Saldivia A, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods P, Wright T, Žugec P. New reaction rates for the destruction of 7Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023907001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
New measurements of the7Be(n,α)4He and7Be(n,p)7Li reaction cross sections from thermal to keV neutron energies have been recently performed at CERN/n_TOF. Based on the new experimental results, astrophysical reaction rates have been derived for both reactions, including a proper evaluation of their uncertainties in the thermal energy range of interest for big bang nucleosynthesis studies. The new estimate of the7Be destruction rate, based on these new results, yields a decrease of the predicted cosmological7Li abundance insufficient to provide a viable solution to the cosmological lithium problem.
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Mastromarco M, Mazzone A, Massimi C, Cristallo S, Colonna N, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Cortés GP, Cortés-Giraldo MA, Cosentino L, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Mastinu PF, Maugeri E, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. The 154Gd neutron capture cross section measured at the n_TOF facility and its astrophysical implications. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023907003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The (n, γ) cross sections of the gadolinium isotopes play an important role in the study of the stellar nucleosynthesis. In particular, among the isotopes heavier than Fe, 154Gd together with 152Gd have the peculiarity to be mainly produced by the slow capture process, the so-called s-process, since they are shielded against the β-decay chains from the r-process region by their stable samarium isobars. Such a quasi pure s-process origin makes them crucial for testing the robustness of stellar models in galactic chemical evolution (GCE). According to recent models, the 154Gd and 152Gd abundances are expected to be 15-20% lower than the reference un-branched s-process 150Sm isotope. The close correlation between stellar abundances and neutron capture cross sections prompted for an accurate measurement of 154Gd cross section in order to reduce the uncertainty attributable to nuclear physics input and eventually rule out one of the possible causes of present discrepancies between observation and model predictions. To this end, the neutron capture cross section of 154Gd was measured in a wide neutron energy range (from thermal up to some keV) with high resolution in the first experimental area of the neutron time-of-flight facility n_TOF (EAR1) at CERN. In this contribution, after a brief description of the motivation and of the experimental setup used in the measurement, the preliminary results of the 154Gd neutron capture reaction as well as their astrophysical implications are presented.
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Lerendegui-Marco J, Guerrero C, Mendoza E, Quesada JM, Eberhardt K, Junghans A, Krtiička M, Belgya T, Maróti B, Aberle O, Andrzejewski J, Audouin L, Bécares V, Bacak M, Balibrea J, Barbagallo M, Barros S, Bečvář F, Beinrucker C, Berthoumieux E, Billowes J, Bosnar D, Brugger M, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Diakaki M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Gunsing F, Harada H, Heftrich T, Heinitz S, Heyse J, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Katabuchi T, Kavrigin P, Ketlerov V, Khryachkov V, Kimura A, Kivel N, Knapova I, Kokkoris M, Leal-Cidoncha E, Lederer C, Leeb H, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mengoni A, Milazzo PM, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras JI, Praena J, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Schumann D, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weigand M, Weiss C, Wolf C, Woods PJ, Wright T, Žugec P. Measurement of the 242Pu(n, γ) cross section from thermal to 500 keV at the Budapest research reactor and CERN n_TOF-EAR1 facilities. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The design and operation of innovative nuclear systems requires a better knowledge of the capture and fission cross sections of the Pu isotopes. For the case of capture on 242Pu, a reduction of the uncertainty in the fast region down to 8-12% is required. Moreover, aiming at improving the evaluation of the fast energy range in terms of average parameters, the OECD NEA High Priority Request List (HPRL) requests high-resolution capture measurements with improved accuracy below 2 keV. The current uncertainties also affect the thermal point, where previous experiments deviate from each other by 20%. A fruitful collaboration betwen JGU Mainz and HZ Dresden-Rossendorf within the EC CHANDA project resulted in a 242Pu sample consisting of a stack of seven fission-like targets making a total of 95(4) mg of 242Pu electrodeposited on thin (11.5 μm) aluminum backings. This contribution presents the results of a set of measurements of the 242Pu(n, γ) cross section from thermal to 500 keV combining different neutron beams and techniques. The thermal point was determined at the Budapest Research Reactor by means of Neutron Activation Analysis and Prompt Gamma Analysis, and the resolved (1 eV - 4 keV) and unresolved (1 - 500 keV) resonance regions were measured using a set of four Total Energy detectors at the CERN n_TOF-EAR1.
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Alcayne V, Mendoza E, Cano-Ott D, Kimura A, Aberle O, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bécares V, Bečvář F, Bellia G, Berthoumieux E, Billowes J, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Glodariu T, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Kadi Y, Käppeler F, Kivel N, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lo Meo S, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Matteucci F, Maugeri E, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Piersanti L, Porras I, Praena J, Quesada JM, Radeck D, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Smith AG, Sosnin N, Stamatopoulos A, Tagliente G, Tain JL, Talip Z, Tarifeño-Saldivia AE, Tassan-Got L, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Measurement of the 244Cm capture cross sections at both CERN n_TOF experimental areas. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023901034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Accurate neutron capture cross section data for minor actinides (MAs) are required to estimate the production and transmutation rates of MAs in light water reactors with a high burnup, critical fast reactors like Gen-IV systems and other innovative reactor systems such as accelerator driven systems (ADS). Capture reactions of244Cm open the path for the formation of heavier Cm isotopes and of heavier elements such as Bk and Cf. In addition,244Cm shares nearly 50% of the total actinide decay heat in irradiated reactor fuels with a high burnup, even after three years of cooling.Experimental data for this isotope are very scarce due to the difficulties of providing isotopically enriched samples and because the high intrinsic activity of the samples requires the use of neutron facilities with high instantaneous flux. The only two previous experimental data sets for this neutron capture cross section have been obtained in 1969 using a nuclear explosion and, more recently, at J-PARC in 2010. The neutron capture cross sections have been measured at n_TOF with the same samples that the previous experiments in J-PARC. The samples were measured at n_TOF Experimental Area 2 (EAR-2) with three C6D6detectors and also in Experimental Area 1 (EAR-1) with the Total Absorption Calorimeter (TAC). Preliminary results assessing the quality and limitations of these new experimental datasets are presented for the experiments in both areas. Preliminary yields of both measurements will be compared with evaluated libraries for the first time.
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Eleme Z, Patronis N, Stamatopoulos A, Tsinganis A, Kokkoris M, Michalopoulou V, Diakaki M, Vlastou R, Tassan-Got L, Colonna N, Heyse J, Barbagallo M, Mastromarco M, Macina D, Chiaveri E, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kopatch Y, Krticˇka M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Thomas B, Torres-Sánchez P, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Wallner A, Woods PJ, Wright TJ, Žugec P. First results of the 241Am(n,f) cross section measurement at the Experimental Area 2 of the n_TOF facility at CERN. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202023905014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Feasibility, design and sensitivity studies on innovative nuclear reactors that could address the issue of nuclear waste transmutation using fuels enriched in minor actinides, require high accuracy cross section data for a variety of neutron-induced reactions from thermal energies to several tens of MeV. The isotope 241Am (T1/2= 433 years) is present in high-level nuclear waste (HLW), representing about 1.8 % of the actinide mass in spent PWR UOx fuel. Its importance increases with cooling time due to additional production from the β-decay of 241Pu with a half-life of 14.3 years. The production rate of 241 Am in conventional reactors, including its further accumulation through the decay of 241Pu and its destruction through transmutation/incineration are very important parameters for the design of any recycling solution. In the present work, the 241 Am(n,f) reaction cross-section was measured using Micromegas detectors at the Experimental Area 2 of the n_TOF facility at CERN. For the measurement, the 235U(n,f) and 238U(n,f) reference reactions were used for the determination of the neutron flux. In the present work an overview of the experimental setup and the adopted data analysis techniques is given along with preliminary results.
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de Paula E, Ribeiro A, Vaz P, Vaz G, Melo T, Cavalca R. PCV15 GOOD PRACTICES ASSESSMENT FOR CARDIAC SURGERIES: A REAL WORLD ANALYSIS. Value Health Reg Issues 2019. [DOI: 10.1016/j.vhri.2019.08.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ribeiro A, Gaspar A, Rosito F, de Paula E, Vaz P, Pereira A. PRO14 COMPARAR A INCIDÊNCIA DE COMORBIDADES NO TRATAMENTOS DE MIELOMA MÚLTIPLO ENTRE AS TERAPIAS DO SISTEMA DE SAÚDE BRASILEIRO (SUS) COM AS AINDA NÃO INCORPORADAS. Value Health Reg Issues 2019. [DOI: 10.1016/j.vhri.2019.08.421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Monteiro Gil O, Youngman M, Vaz P, Angus P, Battisti P, Berkovskyy V, Bonchuk Y, Broggio D, Brudecki K, Dąbrowski K, de Groot T, Fojtík P, Franck D, Jaworska A, Jourquin F, Jug N, Kónyi JK, Krajewska G, Lebacq AL, Leenders M, Lepasson M, Lopez MA, Malátova I, Martins JO, Meisenberg O, Ośko J, Pázmándi T, Peace MS, Rosário P, Solný P, Stenström M, Stoyanov O, Tormo ML, Urboniene A, Vagfoldi Z, Vasilenko V, Willens P, Zagyvai P. A survey on emergency thyroid monitoring strategies and capacities in Europe and comparison with international recommendations. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bacak M, Aiche M, Bélier G, Berthoumieux E, Diakaki M, Dupont E, Gunsing F, Heyse J, Kopecky S, Laurent B, Leeb H, Mathieu L, Schillebeeckx P, Serot O, Taieb J, Vlachoudis V, Aberle O, Andrzejewski J, Audouin L, Balibrea J, Barbagallo M, Bečvář F, Billowes J, Bosnar D, Brown A, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Domingo-Pardo C, Dressler R, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Gilardoni S, Glodariu T, Gonçalves IF, González-Romero E, Griesmayer E, Guerrero C, Harada H, Heinitz S, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kalamara A, Kavrigin P, Kimura A, Kivel N, Knapova I, Kokkoris M, Krtička M, Kurtulgil D, Leal-Cidoncha E, Lederer C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Marganiec J, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Radeck D, Rauscher T, Reifarth R, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schumann D, Sedyshev P, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlastou R, Wallner A, Warren S, Weiss C, Woods PJ, Wright T, Žugec P. Preliminary results on the 233U capture cross section and alpha ratio measured at n_TOF (CERN) with the fission tagging technique. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921103007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
233U is of key importance among the fissile nuclei in the Th-U fuel cycle. A particularity of 233U is its small neutron capture cross-section, which is on average about one order of magnitude lower than the fission cross-section. The accuracy in the measurement of the 233U capture cross-section depends crucially on an efficient capture-fission discrimination, thus a combined set-up of fission and γ-detectors is needed. A measurement of the 233U capture cross-section and capture-to-fission ratio was performed at the CERN n_TOF facility. The Total Absorption Calorimeter (TAC) of n_TOF was employed as γ-detector coupled with a novel compact ionization chamber as fission detector. A brief description of the experimental set-up will be given, and essential parts of the analysis procedure as well as the preliminary response of the set-up to capture are presented and discussed.
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Gomez N, Alves M, Sousa IM, Vaz P, Jordão A. How to Improve the Transition from Pediatric to Adult Health Care Services? ACTA MEDICA PORT 2019; 32:326-327. [PMID: 31067434 DOI: 10.20344/amp.12174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 04/12/2019] [Indexed: 11/20/2022]
Affiliation(s)
- Nayive Gomez
- Serviço de Medicina III. Hospital Pulido Valente. Centro Hospitalar de Lisboa Norte. Lisboa. Portugal
| | - Mariana Alves
- Serviço de Medicina III. Hospital Pulido Valente. Centro Hospitalar de Lisboa Norte. Lisboa. Departamento Medicina I. Faculdade de Medicina. Universidade de Lisboa. Lisboa. Portugal
| | - Inês Moreira Sousa
- Serviço de Medicina III. Hospital Pulido Valente. Centro Hospitalar de Lisboa Norte. Lisboa. Portugal
| | - Pedro Vaz
- Serviço de Medicina III. Hospital Pulido Valente. Centro Hospitalar de Lisboa Norte. Lisboa. Portugal
| | - Alda Jordão
- Serviço de Medicina III. Hospital Pulido Valente. Centro Hospitalar de Lisboa Norte. Lisboa. Departamento Medicina I. Faculdade de Medicina. Universidade de Lisboa. Lisboa. Portugal
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Verhaegen F, Vaz P, Prise KM. Small animal image-guided radiotherapy. Br J Radiol 2019. [DOI: 10.1259/bjr.20199002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Frank Verhaegen
- Department of Radiation Oncology (MAASTRO), GROW—School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, Netherlands
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Portugal
| | - Kevin M Prise
- Centre for Cancer Research and Cell Biology, Queen’s University, Belfast, United Kingdom
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Baptista M, Di Maria S, Vieira S, Santos J, Pereira J, Pereira M, Vaz P. Dosimetric assessment of the exposure of radiotherapy patients due to cone-beam CT procedures. Radiat Environ Biophys 2019; 58:21-37. [PMID: 30392077 DOI: 10.1007/s00411-018-0760-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 10/30/2018] [Indexed: 06/08/2023]
Abstract
Cone-beam computed tomography (CBCT) is widely used for pre-treatment verification and patient setup in image-guided radiation therapy (IGRT). CBCT imaging is employed daily and several times per patient, resulting in potentially high cumulative imaging doses to healthy tissues that surround exposed target organs. Computed tomography dose index (CTDI) is the parameter used by CBCT equipment as indication of the radiation output to patients. This study aimed to increase the knowledge on the relation between CBCT organ doses and weighted CTDI (CTDIW) for a thorax scanning protocol. A CBCT system was modelled using the Monte Carlo (MC) radiation transport program MCNPX2.7.0. Simulation results were validated against half-value layer (HVL), axial beam profile, patient skin dose (PSD) and CTDI measurements. For organ dose calculations, a male voxel phantom ("Golem") was implemented with the CBCT scanner computational model. After a successful MC model validation with measurements, a systematic comparison was performed between organ doses (and their distribution) and CTDI dosimetry concepts [CTDIW and cumulative dose quantities f100(150) and [Formula: see text]]. The results obtained show that CBCT organ doses vary between 1.2 ± 0.1 mGy and 3.3 ± 0.2 mGy for organs located within the primary beam. It was also verified that CTDIW allows prediction of absorbed doses to tissues at distances of about 5 cm from the isocentre of the CBCT system, whereas f100(150) allows prediction of organ doses at distances of about 10 cm from the isocentre, independently from its location. This study demonstrates that these dosimetric concepts are suitable methods that easily allow a good approximation of the additional CBCT imaging doses during a typical lung cancer IGRT treatment.
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Affiliation(s)
- Mariana Baptista
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal.
| | - Salvatore Di Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
| | - Sandra Vieira
- Fundação Champalimaud, Centro Clínico Champalimaud, Avenida de Brasília, 1400-038, Lisbon, Portugal
| | - Joana Santos
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
- Instituto Politécnico de Coimbra, ESTESC, DIMR, Rua 5 de Outubro, 3046-854, Coimbra, Portugal
| | - Joana Pereira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
- Laboratório de Protecção e Segurança Radiológica, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
| | - Miguel Pereira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
- Laboratório de Protecção e Segurança Radiológica, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
| | - Pedro Vaz
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Estrada Nacional 10, km 139,7, 2695-066, Bobadela LRS, Portugal
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Tassan-Got L, Colonna N, Diakaki M, Eleme Z, Manna A, Sekhar A, Stamatopoulos A, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krticˇka M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Smith AG, Sosnin N, Sprung P, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Fission program at n_TOF. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921103006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Since its start in 2001 the n_TOF collaboration developed a measurement program on fission, in view of advanced fuels in new generation reactors. A special effort was made on measurement of cross sections of actinides, exploiting the peculiarity of the n_TOF neutron beam which spans a huge energy domain, from the thermal region up to GeV. Moreover fission fragment angular distributions have also been measured. An overview of the cross section results achieved with different detectors is presented, including a discussion of the 237Np case where discrepancies showed up between different detector systems. The results on the anisotropy of the fission fragments and its implication on the mechanism of neutron absorption, and in applications, are also shown.
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Moreno-Soto J, Berthoumieux E, Dupont E, Gunsing F, Serot O, Litaize O, Diakaki M, Chebboubi A, Dridi W, Valenta S, Krtiˇcka M, Aberle O, Alcayne V, Andrzejewski J, Audouin L, Bécares V, Babiano-Suarez V, Bacak M, Barbagallo M, Benedikt T, Bennett S, Billowes J, Bosnar D, Brown A, Busso M, Caamaño M, Caballero-Ontanaya L, Calviño F, Calviani M, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Durán I, Eleme Z, Fernández-Domínguez B, Ferrari A, Finocchiaro P, Furman V, Göbel K, Gawlik A, Gilardoni S, Gonçalves IF, González-Romero E, Guerrero C, Heinitz S, Heyse J, Jenkins DG, Junghans A, Käppeler F, Kadi Y, Kimura A, Knapova I, Kokkoris M, Kopatch Y, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri EA, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Persanti L, Petrone C, Pirovano E, Porras I, Praena J, Quesada JM, Ramos-Doval D, Rauscher T, Reifarth R, Rochman D, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Simone S, Smith AG, Sosnin NV, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Ulrich J, Urlass S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright T, Žugec P. Study of the photon strength functions and level density in the gamma decay of the n + 234U reaction. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921102002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The accurate calculations of neutron-induced reaction cross sections are relevant for many nuclear applications. The photon strength functions and nuclear level densities are essential inputs for such calculations. These quantities for 235U are studied using the measurement of the gamma de-excitation cascades in radiative capture on 234U with the Total Absorption Calorimeter at n_TOF at CERN. This segmented 4π gamma calorimeter is designed to detect gamma rays emitted from the nucleus with high efficiency. This experiment provides information on gamma multiplicity and gamma spectra that can be compared with numerical simulations. The code DICEBOXC is used to simulate the gamma cascades while GEANT4 is used for the simulation of the interaction of these gammas with the TAC materials. Available models and their parameters are being tested using the present data. Some preliminary results of this ongoing study are presented and discussed.
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Alcayne V, Kimura A, Mendoza E, Cano-Ott D, Martínez T, Aberle O, Andrzejewski J, Audouin L, Bécares V, Bacak M, Barbagallo M, Becčvář F, Bellia G, Berthoumieux E, Billowes J, Bosnar D, Brown A, Busso M, Caamaño M, Caballero-Ontanaya L, Calviño F, Calviani M, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Eleme Z, Fernández-Domínguez B, Ferrari A, Finocchiaro P, Furman V, Göbel K, Gawlik A, Gilardoni S, Glodariu T, Gonçalves IF, González-Romero E, Guerrero C, Gunsing F, Harada H, Heinitz S, Heyse J, Jenkins DG, Käppeler F, Kadi Y, Katabuchi T, Kivel N, Knapova I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Masi A, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Persanti L, Porras I, Praena J, Quesada JM, Radeck D, Ramos-Doval D, Rauscher T, Reifarth R, Rochman D, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Simone S, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Talip T, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright T, Žugec P. Measurement of the 244Cm and 246Cm neutron-induced capture cross sections at the n_TOF facility. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921103008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The neutron capture reactions of the 244Cm and 246Cm isotopes open the path for the formation of heavier Cm isotopes and heavier elements such as Bk and Cf in a nuclear reactor. In addition, both isotopes belong to the minor actinides with a large contribution to the decay heat and to the neutron emission in irradiated fuels. There are only two previous 244Cm and 246Cm capture cross section measurements: one in 1969 using a nuclear explosion [1] and the most recent data measured at J-PARC in 2010 [2]. The data for both isotopes are very scarce due to the difficulties in performing the measurements: high intrinsic activity of the samples and limited facilities capable of providing isotopically enriched samples.
We have measured both neutron capture cross sections at the n_TOF Experimental Area 2 (EAR-2) with three C6 D6 detectors and also at Area 1 (EAR-1) with the TAC. Preliminary results assessing the quality and limitations (back-ground subtraction, measurement technique and counting statistics) of this new experimental datasets are presented and discussed.
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Teles P, Costa J, Costa D, Matela N, Vaz P. Activity estimation and biokinetic analysis of 99mTc-DMSA in renal infant patients using a gamma camera. Phys Med 2018; 52:9-17. [PMID: 30139615 DOI: 10.1016/j.ejmp.2018.06.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/08/2018] [Accepted: 06/09/2018] [Indexed: 10/28/2022] Open
Abstract
Biokinetic data from the administration of radiopharmaceuticals is essential in nuclear medicine dosimetry. It has particular significance in children, as their metabolism is very different from adults. Biokinetic models for paediatric patients could therefore need to be adapted to better reflect their absorption, retention and excretion functions, when compared to adults. Obtaining quality in vivo infant or paediatric biokinetic data is then essential to improve the available reference models, which in turn can lead to the optimization of paediatric procedures and protocols in clinical practice. This study analyses the biokinetic behaviour of 99mTc-dimercaptosuccinic acid (DMSA), in 8 infants aged 4 months to 2 years old, through an imaging study using a gamma camera, and compares the obtained values with those obtained with the reference ICRP biokinetic model. The in vivo data was treated using an adapted methodology from the MIRD 16 pamphlet. Activity curves for the liver, the kidney and the whole body, were built, and new effective absorption, retention and excretion half-lives were estimated, and compared with the reference biokinetic parameters of ICRP 128. The obtained residence time in the kidneys of 2.56 h, has a deviation of 30.8% to the ICRP 128 value of 3.70 h. The obtained maximum uptake in the kidneys was of 0.22/A0, which compares to the value of 0.31/A0 for ICRP. The obtained biokinetic parameters were used to estimate the absorbed dose. The obtained dose values are smaller than the reference ICRP 128 ones by 32.1% in the kidneys, and 18.4% in the liver.
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Affiliation(s)
- P Teles
- Grupo de Protecção e Segurança Radiológica, Centro de Ciências e Tecnologias Nucleares (C2TN), CTN/IST, Pólo de Loures. Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal.
| | - J Costa
- Grupo de Protecção e Segurança Radiológica, Centro de Ciências e Tecnologias Nucleares (C2TN), CTN/IST, Pólo de Loures. Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal; Departamento de Física, Faculdade de Ciências e Tecnologias da Universidade Nova de Lisboa, Quinta da Torre, Campus Universitário, 2829-516 Caparica, Portugal
| | - D Costa
- Serviço de Medicina Nuclear, Champalimaud Centre for the Unknown, Av. Brasília, 1400-038 Lisboa, Portugal
| | - N Matela
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande 1749-016 Lisboa, Portugal
| | - P Vaz
- Grupo de Protecção e Segurança Radiológica, Centro de Ciências e Tecnologias Nucleares (C2TN), CTN/IST, Pólo de Loures. Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
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