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Cox I, Xu ZY, Grzywacz R, Ong WJ, Rasco BC, Kitamura N, Hoskins D, Neupane S, Ruland TJ, Allmond JM, King TT, Lubna RS, Rykaczewski KP, Schatz H, Sherrill BM, Tarasov OB, Ayangeakaa AD, Berg HC, Bleuel DL, Cerizza G, Christie J, Chester A, Davis J, Dembski C, Doetsch AA, Duarte JG, Estrade A, Fijałkowska A, Gray TJ, Good EC, Haak K, Hanai S, Harke JT, Harris C, Hermansen K, Hoff DEM, Jain R, Karny M, Kolos K, Laminack A, Liddick SN, Longfellow B, Lyons S, Madurga M, Mogannam MJ, Nowicki A, Ogunbeku TH, Owens-Fryar G, Rajabali MM, Richard AL, Ronning EK, Rose GE, Siegl K, Singh M, Spyrou A, Sweet A, Tsantiri A, Walters WB, Yokoyama R. Proton Shell Gaps in N=28 Nuclei from the First Complete Spectroscopy Study with FRIB Decay Station Initiator. Phys Rev Lett 2024; 132:152503. [PMID: 38682970 DOI: 10.1103/physrevlett.132.152503] [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: 10/19/2023] [Revised: 12/12/2023] [Accepted: 03/08/2024] [Indexed: 05/01/2024]
Abstract
The first complete measurement of the β-decay strength distribution of _{17}^{45}Cl_{28} was performed at the Facility for Rare Isotope Beams (FRIB) with the FRIB Decay Station Initiator during the second FRIB experiment. The measurement involved the detection of neutrons and γ rays in two focal planes of the FRIB Decay Station Initiator in a single experiment for the first time. This enabled an analytical consistency in extracting the β-decay strength distribution over the large range of excitation energies, including neutron unbound states. We observe a rapid increase in the β-decay strength distribution above the neutron separation energy in _{18}^{45}Ar_{27}. This was interpreted to be caused by the transitioning of neutrons into protons excited across the Z=20 shell gap. The SDPF-MU interaction with reduced shell gap best reproduced the data. The measurement demonstrates a new approach that is sensitive to the proton shell gap in neutron rich nuclei according to SDPF-MU calculations.
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Affiliation(s)
- I Cox
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Z Y Xu
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - R Grzywacz
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - W-J Ong
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B C Rasco
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - N Kitamura
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - D Hoskins
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - S Neupane
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T J Ruland
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - J M Allmond
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - T T King
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - R S Lubna
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - K P Rykaczewski
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - H Schatz
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - B M Sherrill
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - O B Tarasov
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - A D Ayangeakaa
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
- Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
| | - H C Berg
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - D L Bleuel
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Cerizza
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Christie
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - A Chester
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Davis
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - C Dembski
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - A A Doetsch
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J G Duarte
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Estrade
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - A Fijałkowska
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
| | - T J Gray
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E C Good
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - K Haak
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - S Hanai
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - J T Harke
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Harris
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - K Hermansen
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - D E M Hoff
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Jain
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Karny
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
| | - K Kolos
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Laminack
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - S N Liddick
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Lyons
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - M Madurga
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M J Mogannam
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Nowicki
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - T H Ogunbeku
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Owens-Fryar
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - M M Rajabali
- Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505, USA
| | - A L Richard
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E K Ronning
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - G E Rose
- University of California, Berkeley, Berkeley, California 94704, USA
| | - K Siegl
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Singh
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - A Spyrou
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Sweet
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Tsantiri
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - W B Walters
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | - R Yokoyama
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
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2
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Kasanda E, Bildstein V, Hymers D, Easter J, Richard AL, Baumann T, Spyrou A, Höhr C, Mücher D. Range verification in heavy-ion therapy using a hadron tumour marker. Phys Med Biol 2023; 68:195018. [PMID: 37747082 DOI: 10.1088/1361-6560/acf557] [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: 03/02/2023] [Accepted: 08/30/2023] [Indexed: 09/26/2023]
Abstract
Objective.A new method to estimate the range of an ion beam in a patient during heavy-ion therapy was investigated, which was previously verified for application in proton therapy.Approach.The method consists of placing a hadron tumour marker (HTM) close to the tumour. As the treatment beam impinges on the HTM, the marker undergoes nuclear reactions. When the HTM material is carefully chosen, the activation results in the emission of several delayed, characteristicγrays, whose intensities are correlated with the remaining range inside the patient. When not just one but two reaction channels are investigated, the ratio between these twoγray emissions can be measured, and the ratio is independent of any beam delivery uncertainties.Main results.A proof-of-principle experiment with an16O ion beam and Ag foils as HTM was successfully executed. The107Ag(16O,x)112Sb and the107Ag(16O,x)114Sb reaction channels were identified as suitable for the HTM technique. When only oneγ-ray emission is measured, the resulting range-uncertainty estimation is at the 0.5 mm scale. When both channels are considered, a theoretical limit on the range uncertainty of a clinical fiducal marker was found to be ±290μm.Significance.Range uncertainty of a heavy-ion beam limits the prescribed treatment plan for cancer patients, especially the direction of the ion beam in relation to any organ at risk. An easy to implement range-verification technique which can be utilized during clinical treatment would allow treatment plans to take full advantage of the sharp fall-off of the Bragg peak without the risk of depositing excessive dose into healthy tissue.
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Affiliation(s)
- E Kasanda
- Department of Physics, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
- Laboratory for High Energy Physics, Universität Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - V Bildstein
- Department of Physics, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
| | - D Hymers
- Department of Physics, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
- Institut für Kernphysik der Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - J Easter
- Department of Physics, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
| | - A L Richard
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, United States of America
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, United States of America
| | - T Baumann
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, United States of America
| | - A Spyrou
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, United States of America
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, United States of America
| | - C Höhr
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia, V8P 5C2, Canada
| | - D Mücher
- Department of Physics, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
- Institut für Kernphysik der Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
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3
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Lewis R, Couture A, Liddick SN, Spyrou A, Bleuel DL, Campo LC, Crider BP, Dombos AC, Guttormsen M, Kawano T, Larsen AC, Lewis AM, Mosby S, Perdikakis G, Prokop CJ, Quinn SJ, Renstrøm T, Siem S. Statistical (n, γ ) cross section model comparison for short-lived nuclei. Eur Phys J A Hadron Nucl 2023; 59:42. [PMID: 36915898 PMCID: PMC9998597 DOI: 10.1140/epja/s10050-023-00920-0] [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: 12/13/2022] [Accepted: 01/11/2023] [Indexed: 06/18/2023]
Abstract
UNLABELLED Neutron-capture cross sections of neutron-rich nuclei are calculated using a Hauser-Feshbach model when direct experimental cross sections cannot be obtained. A number of codes to perform these calculations exist, and each makes different assumptions about the underlying nuclear physics. We investigated the systematic uncertainty associated with the choice of Hauser-Feshbach code used to calculate the neutron-capture cross section of a short-lived nucleus. The neutron-capture cross section for 73 Zn (n, γ ) 74 Zn was calculated using three Hauser-Feshbach statistical model codes: TALYS, CoH, and EMPIRE. The calculation was first performed without any changes to the default settings in each code. Then an experimentally obtained nuclear level density (NLD) and γ -ray strength function ( γ SF ) were included. Finally, the nuclear structure information was made consistent across the codes. The neutron-capture cross sections obtained from the three codes are in good agreement after including the experimentally obtained NLD and γ SF , accounting for differences in the underlying nuclear reaction models, and enforcing consistent approximations for unknown nuclear data. It is possible to use consistent inputs and nuclear physics to reduce the differences in the calculated neutron-capture cross section from different Hauser-Feshbach codes. However, ensuring the treatment of the input of experimental data and other nuclear physics are similar across multiple codes requires a careful investigation. For this reason, more complete documentation of the inputs and physics chosen is important. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1140/epja/s10050-023-00920-0.
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Affiliation(s)
- R. Lewis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 USA
- Present Address: Zeno Power Systems, Inc., Washington, DC USA
| | - A. Couture
- Los Alamos National Laboratory, Los Alamos, NM 87545 USA
| | - S. N. Liddick
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 USA
| | - A. Spyrou
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 USA
| | - D. L. Bleuel
- Lawrence Livermore National Laboratory, Livermore, CA 94550 USA
| | - L. Crespo Campo
- Department of Physics, University of Oslo, 0316 Oslo, Norway
| | - B. P. Crider
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 USA
| | - A. C. Dombos
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 USA
| | - M. Guttormsen
- Department of Physics, University of Oslo, 0316 Oslo, Norway
| | - T. Kawano
- Los Alamos National Laboratory, Los Alamos, NM 87545 USA
| | - A. C. Larsen
- Department of Physics, University of Oslo, 0316 Oslo, Norway
| | - A. M. Lewis
- Department of Nuclear Engineering, University of California Berkeley, Berkeley, CA 94720 USA
- Present Address: Naval Nuclear Laboratory, New York, USA
| | - S. Mosby
- Los Alamos National Laboratory, Los Alamos, NM 87545 USA
| | - G. Perdikakis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 USA
- Central Michigan University, Mount Pleasant, MI 48859 USA
| | - C. J. Prokop
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 USA
| | - S. J. Quinn
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 USA
| | - T. Renstrøm
- Department of Physics, University of Oslo, 0316 Oslo, Norway
| | - S. Siem
- Department of Physics, University of Oslo, 0316 Oslo, Norway
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Maltezou HC, Tseroni M, Drositis I, Gamaletsou MN, Koukou DM, Bolikas E, Peskelidou E, Daflos C, Panagiotaki E, Ledda C, Pavli A, Moussas N, Kontogianni S, Svarna E, Ploumidis M, Spyrou A, Chini M, Adamis G, Lourida A, Hatzigeorgiou D, Gargalianos P, Syrogiannopoulos G, Sipsas NV. Vaccination coverage rates and attitudes towards mandatory vaccinations among healthcare personnel in tertiary-care hospitals in Greece. Expert Rev Vaccines 2022; 21:853-859. [PMID: 35382665 DOI: 10.1080/14760584.2022.2063118] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES : Our aim was to estimate vaccination and susceptibility rates against vaccine-preventable diseases among healthcare personnel (HCP) in eight hospitals. METHODS This study was a cross-sectional survey. RESULTS A total of 1284 HCP participated (physicians: 31.3%, nursing personnel: 36.6%, paramedical personnel: 11.1%, administrative personnel: 13.2%, supportive personnel: 7.3%). Vaccination rates were 32.9% against measles and mumps, 38.1% against rubella, 5.7% against varicella, 9.2% against hepatitis A, 65.8% against hepatitis B, 31.8% against tetanus-diphtheria, 7.1% against pertussis, 60.2% against influenza, and 80.1% against COVID-19. Susceptibility rates were: 27.8% for measles, 39.6% for mumps, 33.4% for rubella, 22.2% for varicella, 86.3% for hepatitis A, 34.2% for hepatitis B, 68.2% for tetanus-diphtheria, and 92.9% for pertussis. Older HCP had higher susceptibility rates against mumps, rubella, varicella, hepatitis A, hepatitis B, tetanus-diphtheria, and pertussis (p-values <0.001 for all). Mandatory vaccinations were supported by 81.85% of HCP. CONCLUSIONS Although most HCP supported mandatory vaccinations, significant vaccination gaps and susceptibility rates were recorded. The proportion of susceptible HCP to measles, mumps, rubella, and varicella increased the past decade, mostly because of reduction of acquired cases of natural illness. Vaccination programs for HCP should be developed. A national registry to follow HCP' vaccination rates is urgently needed.
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Affiliation(s)
- Helena C Maltezou
- Directorate of Research, Studies, and Documentation, National Public Health Organization, Athens, Greece
| | - Maria Tseroni
- Directorate of Epidemiological Surveillance of Infectious Diseases, National Public Health Organization, Athens, Greece
| | - Ioannis Drositis
- Medical Oncology Department, Venizeleio-Pananeio General Hospital, Heraklion, Greece
| | - Maria N Gamaletsou
- Pathophysiology Department, Medical School, National and Kapodistrian University of Athens, and General Hospital of Athens Laiko, Athens, Greece
| | - Dimitra Maria Koukou
- First Department of Pediatrics, University of Athens, Aghia Sophia Children's Hospital, Athens, Greece
| | - Emmanouil Bolikas
- Infection Control Committee, Venizeleio-Pananeio General Hospital, Heraklion, Greece
| | - Emmanuela Peskelidou
- COVID-19 Intensive Care Unit, 424 General Military Hospital of Thessaloniki, Thessaloniki, Greece
| | - Charalambos Daflos
- Infection Control Committee, Korgialeneio-Benakeio Red Cross General Hospital, Athens, Greece
| | | | - Caterina Ledda
- Occupational Medicine Unit, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Androula Pavli
- Department for Travel Medicine, National Public Health Organization, Athens, Greece
| | - Nikolaos Moussas
- Internal Medicine and Infectious Diseases Clinic, Iatriko Athinon General Hospital, Athens, Greece
| | | | - Eftychia Svarna
- Department of Pediatrics, University of Thessaly, Larissa, Greece
| | - Michalis Ploumidis
- First Department of Internal Medicine - Infectious Diseases Unit, Gennimatas General Hospital, Athens, Greece
| | - Andronikos Spyrou
- First Department of Internal Medicine - Infectious Diseases Unit, Gennimatas General Hospital, Athens, Greece
| | - Maria Chini
- Third Department of Internal Medicine and Infectious Diseases Unit, Korgialeneio-Benakeio Red Cross Hospital, Athens, Greece
| | - Georgios Adamis
- First Department of Internal Medicine - Infectious Diseases Unit, Gennimatas General Hospital, Athens, Greece
| | - Athanasia Lourida
- Infection Prevention and Control Committee, Aghia Sofia Children's Hospital, Athens, Greece
| | | | - Panagiotis Gargalianos
- Internal Medicine and Infectious Diseases Clinic, Iatriko Athinon General Hospital, Athens, Greece
| | | | - Nikolaos V Sipsas
- Pathophysiology Department, Medical School, National and Kapodistrian University of Athens, and General Hospital of Athens Laiko, Athens, Greece
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5
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Maltezou HC, Pavli A, Dedoukou X, Georgakopoulou T, Raftopoulos V, Drositis I, Bolikas E, Ledda C, Adamis G, Spyrou A, Karantoni E, Gamaletsou MN, Koukou DM, Lourida A, Moussas N, Petrakis V, Panagopoulos P, Hatzigeorgiou D, Theodoridou M, Lazanas M, Gargalianos P, Sipsas NV. Determinants of intention to get vaccinated against COVID-19 among healthcare personnel in hospitals in Greece. Infect Dis Health 2021; 26:189-197. [PMID: 33906828 PMCID: PMC8011642 DOI: 10.1016/j.idh.2021.03.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/19/2021] [Accepted: 03/25/2021] [Indexed: 01/05/2023]
Abstract
BACKGROUND To investigate intention rates to get vaccinated against COVID-19 among healthcare personnel (HCP) in Greece. METHODS Cross-sectional survey. RESULTS The response rate was 14.5%. Of 1521 HCP with a known profession, 607 (39.9%) were nursing personnel, 480 (31.6%) physicians, 171 (11.2%) paramedical personnel, 72 (4.7%) supportive personnel, and 191 (12.6%) administrative personnel. Overall, 803 of 1571 HCP (51.1%) stated their intention to get vaccinated while 768 (48.9%) stated their intention to decline vaccination. Most HCP (71.3%) who reported intent to get vaccinated noted contributing to the control of the pandemic and protecting their families and themselves as their reasons, while the most common reason for reporting intent to decline vaccination was inadequate information about the vaccines (74.9%), followed by concerns about vaccine safety (36.2%). Logistic regression analysis revealed that the probability of intending to get vaccinated increased with male gender, being a physician, history of complete vaccination against hepatitis B, history of vaccination against pandemic A (H1N1) in 2009-2010, belief that COVID-19 vaccination should be mandatory for HCP, and increased confidence in vaccines in general during the COVID-19 pandemic. The following factors were associated with a lower intention to get vaccinated: no vaccination against influenza the past season, no intention to get vaccinated against influenza in 2020-2021, and no intention to recommend COVID-19 vaccination to high-risk patients. CONCLUSION There is an urgent need to built safety perception towards COVID-19 vaccines and raise vaccine uptake rates by HCP, and thus to protect the healthcare workforce and the healthcare services.
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Affiliation(s)
- Helena C Maltezou
- Directorate of Research, Studies, and Documentation, National Public Health Organization, Athens, 11523, Greece.
| | - Androula Pavli
- Department for Travel Medicine, National Public Health Organization, Athens, 11523, Greece
| | | | - Theano Georgakopoulou
- Directorate of Epidemiological Surveillance and Interventions for Infectious Diseases, National Public Health Organization, Athens, 11523, Greece
| | - Vasilios Raftopoulos
- HIV Surveillance Department, National Public Health Organization, Athens, 11523, Greece
| | - Ioannis Drositis
- Medical Oncology Department, Venizeleio-Pananeio General Hospital, Heraklion, 71409, Greece
| | - Emmanouil Bolikas
- Infection Control Committee, Venizeleio-Pananeio General Hospital, Heraklion, 71409, Greece
| | - Caterina Ledda
- Occupational Medicine, Department of Clinical and Experimental Medicine, University of Catania, Catania, 95124, Italy
| | - Georgios Adamis
- First Department of Internal Medicine, Infectious Diseases Unit, Gennimatas General Hospital, Athens, 11527, Greece
| | - Andronikos Spyrou
- First Department of Internal Medicine, Infectious Diseases Unit, Gennimatas General Hospital, Athens, 11527, Greece
| | - Eleni Karantoni
- Medical Directorate, Hellenic Air Force General Staff, Athens, 11525, Greece
| | - Maria N Gamaletsou
- Pathophysiology Department, Medical School, National and Kapodistrian University of Athens, 11527, Greece
| | - Dimitra Maria Koukou
- First Department of Pediatrics, University of Athens, Aghia Sophia Children's Hospital, Athens, 11527, Greece
| | - Athanasia Lourida
- Infection Prevention and Control Committee, Aghia Sofia Children's Hospital, Athens, 11527, Greece
| | - Nikolaos Moussas
- Internal Medicine and Infectious Diseases Clinic, Iatriko Athinon General Hospital, Athens, 11523, Greece
| | - Vasilios Petrakis
- Second Department of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, 68100, Greece
| | - Periklis Panagopoulos
- Second Department of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, 68100, Greece
| | | | - Maria Theodoridou
- First Department of Pediatrics, University of Athens, Aghia Sophia Children's Hospital, Athens, 11527, Greece
| | - Marios Lazanas
- Internal Medicine and Infectious Diseases Department, Iaso Maternity Hospital, Athens, 11523, Greece
| | - Panagiotis Gargalianos
- Internal Medicine and Infectious Diseases Clinic, Iatriko Athinon General Hospital, Athens, 11523, Greece
| | - Nikolaos V Sipsas
- Pathophysiology Department, Medical School, National and Kapodistrian University of Athens, 11527, Greece
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6
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Kyriazopoulou E, Liaskou-Antoniou L, Adamis G, Panagaki A, Melachroinopoulos N, Drakou E, Marousis K, Chrysos G, Spyrou A, Alexiou N, Symbardi S, Alexiou Z, Lagou S, Kolonia V, Gkavogianni T, Kyprianou M, Anagnostopoulos I, Poulakou G, Lada M, Makina A, Roulia E, Koupetori M, Apostolopoulos V, Petrou D, Nitsotolis T, Antoniadou A, Giamarellos-Bourboulis EJ. Procalcitonin to Reduce Long-Term Infection-associated Adverse Events in Sepsis. A Randomized Trial. Am J Respir Crit Care Med 2021; 203:202-210. [PMID: 32757963 PMCID: PMC7874409 DOI: 10.1164/rccm.202004-1201oc] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [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] [Indexed: 11/26/2022] Open
Abstract
Rationale: Although early antimicrobial discontinuation guided by procalcitonin (PCT) has shown decreased antibiotic consumption in lower respiratory tract infections, the outcomes in long-term sepsis sequelae remain unclear. Objectives: To investigate if PCT guidance may reduce the incidence of long-term infection-associated adverse events in sepsis. Methods: In this multicenter trial, 266 patients with sepsis (by Sepsis-3 definitions) with lower respiratory tract infections, acute pyelonephritis, or primary bloodstream infection were randomized (1:1) to receive either PCT-guided discontinuation of antimicrobials or standard of care. The discontinuation criterion was ≥80% reduction in PCT levels or any PCT ≤0.5 μg/L at Day 5 or later. The primary outcome was the rate of infection-associated adverse events at Day 180, a composite of the incidence of any new infection by Clostridioides difficile or multidrug-resistant organisms, or any death attributed to baseline C. difficile or multidrug-resistant organism infection. Secondary outcomes included 28-day mortality, length of antibiotic therapy, and cost of hospitalization. Measurements and Main Results: The rate of infection-associated adverse events was 7.2% (95% confidence interval [CI], 3.8–13.1%; 9/125) versus 15.3% (95% CI, 10.1–22.4%; 20/131) (hazard ratio, 0.45; 95% CI, 0.20–0.98; P = 0.045); 28-day mortality 15.2% (95% CI, 10–22.5%; 19/125) versus 28.2% (95% CI, 21.2–36.5%; 37/131) (hazard ratio, 0.51; 95% CI, 0.29–0.89; P = 0.02); and median length of antibiotic therapy 5 (range, 5–7) versus 10 (range, 7–15) days (P < 0.001) in the PCT and standard-of-care arms, respectively. The cost of hospitalization was also reduced in the PCT arm. Conclusions: In sepsis, PCT guidance was effective in reducing infection-associated adverse events, 28-day mortality, and cost of hospitalization. Clinical trial registered with www.clinicaltrials.gov (NCT03333304).
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Affiliation(s)
| | | | - George Adamis
- Third Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | | | | | - Elina Drakou
- Third Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Konstantinos Marousis
- Third Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Georgios Chrysos
- First Department of Internal Medicine, G. Gennimatas General Hospital of Athens, Athens, Greece
| | - Andronikos Spyrou
- Third Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Nikolaos Alexiou
- Second Department of Internal Medicine, Tzaneio General Hospital of Piraeus, Athens, Greece
| | - Styliani Symbardi
- Second Department of Internal Medicine, Tzaneio General Hospital of Piraeus, Athens, Greece
| | | | - Styliani Lagou
- Second Department of Internal Medicine, Thriasio General Hospital of Eleusis, Athens, Greece; and
| | - Virginia Kolonia
- Second Department of Internal Medicine, Sismanogleio General Hospital of Athens, Athens, Greece
| | | | | | - Ioannis Anagnostopoulos
- Second Department of Internal Medicine, Thriasio General Hospital of Eleusis, Athens, Greece; and
| | - Garyfallia Poulakou
- Second Department of Internal Medicine, Thriasio General Hospital of Eleusis, Athens, Greece; and
| | - Malvina Lada
- Second Department of Internal Medicine, Sismanogleio General Hospital of Athens, Athens, Greece
| | | | | | - Marina Koupetori
- Second Department of Internal Medicine, Tzaneio General Hospital of Piraeus, Athens, Greece
| | | | - Dimitra Petrou
- Second Department of Internal Medicine, Tzaneio General Hospital of Piraeus, Athens, Greece
| | - Thomas Nitsotolis
- First Department of Internal Medicine, G. Gennimatas General Hospital of Athens, Athens, Greece
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7
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Ong WJ, Brown EF, Browne J, Ahn S, Childers K, Crider BP, Dombos AC, Gupta SS, Hitt GW, Langer C, Lewis R, Liddick SN, Lyons S, Meisel Z, Möller P, Montes F, Naqvi F, Pereira J, Prokop C, Richman D, Schatz H, Schmidt K, Spyrou A. β Decay of ^{61}V and its Role in Cooling Accreted Neutron Star Crusts. Phys Rev Lett 2020; 125:262701. [PMID: 33449748 DOI: 10.1103/physrevlett.125.262701] [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: 11/12/2019] [Accepted: 11/18/2020] [Indexed: 06/12/2023]
Abstract
The interpretation of observations of cooling neutron star crusts in quasipersistent x-ray transients is affected by predictions of the strength of neutrino cooling via crust Urca processes. The strength of crust Urca neutrino cooling depends sensitively on the electron-capture and β-decay ground-state-to-ground-state transition strengths of neutron-rich rare isotopes. Nuclei with a mass number of A=61 are predicted to be among the most abundant in accreted crusts, and the last remaining experimentally undetermined ground-state-to-ground-state transition strength was the β decay of ^{61}V. This Letter reports the first experimental determination of this transition strength, a ground-state branching of 8.1_{-3.1}^{+4.0}%, corresponding to a log ft value of 5.5_{-0.2}^{+0.2}. This result was achieved through the measurement of the β-delayed γ rays using the total absorption spectrometer SuN and the measurement of the β-delayed neutron branch using the neutron long counter system NERO at the National Superconducting Cyclotron Laboratory at Michigan State University. This method helps to mitigate the impact of the pandemonium effect in extremely neutron-rich nuclei on experimental results. The result implies that A=61 nuclei do not provide the strongest cooling in accreted neutron star crusts as expected by some predictions, but that their cooling is still larger compared to most other mass numbers. Only nuclei with mass numbers 31, 33, and 55 are predicted to be cooling more strongly. However, the theoretical predictions for the transition strengths of these nuclei are not consistently accurate enough to draw conclusions on crust cooling. With the experimental approach developed in this work, all relevant transitions are within reach to be studied in the future.
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Affiliation(s)
- W-J Ong
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
| | - E F Brown
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Computational Mathematics, Science, and Engineering, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Browne
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
| | - S Ahn
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
- Cylotron Institute, Texas A&M University, College Station, Texas 77843, USA
| | - K Childers
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - B P Crider
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - A C Dombos
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
| | - S S Gupta
- Indian Institute of Technology Ropar, Nangal Road, Rupnagar (Ropar), Punjab 140 001, India
| | - G W Hitt
- Department of Physics and Engineering Science, Coastal Carolina University, Conway, South Carolina 29528, USA
| | - C Langer
- Institute for Applied Physics, Goethe-University Frankfurt a. M., Frankfurt am Main 60438, Germany
| | - R Lewis
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - S N Liddick
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - S Lyons
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
| | - Z Meisel
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Ohio Univeristy, Athens, Ohio 45701, USA
| | - P Möller
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - F Montes
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Naqvi
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India
| | - J Pereira
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Prokop
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - D Richman
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - H Schatz
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
| | - K Schmidt
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Spyrou
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA
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8
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Kasanda E, Burbadge C, Bildstein V, Turko J, Spyrou A, Höhr C, Mücher D. GEANT4 simulation of a range verification method using delayed γ spectroscopy of a 92Mo marker. Phys Med Biol 2020; 65:245047. [PMID: 33331299 DOI: 10.1088/1361-6560/abbd15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In this work, we propose a novel technique for in-vivo proton therapy range verification. This technique makes use of a molybdenum hadron tumour marker, implanted at a short distance from the clinical treatment volume. Signals emitted from the marker during treatment can provide a direct measurement of the proton beam energy at the marker's position. Fusion-evaporation reactions between the proton beam and marker nucleus result in the emission of delayed characteristic γ rays, which are detected off-beam for an improved signal-to-noise ratio. In order to determine the viability of this technique and to establish an experimental setup for future work, the Monte Carlo package GEANT4 was used in combination with ROOT to simulate a treatment scenario with the new method outlined in this work. These simulations show that the intensity of delayed γ rays produced from competing reactions yields a precise measurement of the range of the proton beam relative to the marker, with sub-millimetre uncertainty.
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Affiliation(s)
- E Kasanda
- Department of Physics, University of Guelph, 50 Stone Rd E, Guelph, ON, N1G 2W1, Canada
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9
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Pilipenko Y, Eliava S, Okishev D, Okisheva E, Spyrou A. Vertebral artery and posterior inferior cerebellar artery aneurysms: Results of microsurgical treatment of eighty patients. Surg Neurol Int 2019; 10:227. [PMID: 31819820 PMCID: PMC6884955 DOI: 10.25259/sni_326_2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 08/23/2019] [Accepted: 10/24/2019] [Indexed: 11/04/2022] Open
Abstract
Background The choice of surgical approaches and options for the microsurgical vertebral artery (VA) and posterior inferior cerebellar artery (PICA) aneurysms repair remains controversial. Methods A retrospective analysis of the clinical, surgical, and angiographic data of 80 patients with VA and PICA aneurysms treated from 2012 to 2018 was performed. Results The aneurysms were saccular in 50 cases (62.5%) and fusiform in 30 cases (37.5%). The median suboccipital craniotomy was the most common approach (73.8%). Retrosigmoid craniotomy was performed in 25% of patients. There were the following types of microsurgical operations: neck clipping (61.25%), clipping with the artery lumen formation (13.75%), trapping (10%), proximal clipping (5%), and deconstruction with anastomosis (10%). Fifty-seven (71.3%) patients were discharged without worsening of the clinical signs after surgery. The most common postoperative neurological disorder was palsy of IX and X cranial nerve revealed in 14 (17.5%) patients. No fatal outcomes or patients in vegetative state were identified. The complete occlusion of PICA and VA aneurysms according angiography was in 77 (96.3%) cases. Conclusion Microsurgical treatment is an effective method for VA and PICA aneurysms. The majority of VA and PICA aneurysms do not require complex basal approaches. A thorough preoperative planning, reconstructive clipping techniques, and anastomoses creation, as well as patient selection based on the established algorithms and consultations with endovascular surgeons, may reduce the number of complications and increase the rate of complete microsurgical occlusion in VA and PICA aneurysms.
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Affiliation(s)
- Yuri Pilipenko
- 3 Department (vascular pathology), Federal State Autonomous Institution "N. N. Burdenko National Medical Research Center of Neurosurgery" of the Ministry of Health of the Russian Federation
| | - Shalva Eliava
- 3 Department (vascular pathology), Federal State Autonomous Institution "N. N. Burdenko National Medical Research Center of Neurosurgery" of the Ministry of Health of the Russian Federation
| | - Dmitry Okishev
- 3 Department (vascular pathology), Federal State Autonomous Institution "N. N. Burdenko National Medical Research Center of Neurosurgery" of the Ministry of Health of the Russian Federation
| | - Elena Okisheva
- Department of Internal Diseases, Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, Moscow, Russia
| | - Andronikos Spyrou
- 3 Department (vascular pathology), Federal State Autonomous Institution "N. N. Burdenko National Medical Research Center of Neurosurgery" of the Ministry of Health of the Russian Federation
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10
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Liddick SN, Spyrou A, Crider BP, Naqvi F, Larsen AC, Guttormsen M, Mumpower M, Surman R, Perdikakis G, Bleuel DL, Couture A, Crespo Campo L, Dombos AC, Lewis R, Mosby S, Nikas S, Prokop CJ, Renstrom T, Rubio B, Siem S, Quinn SJ. Publisher's Note: Experimental Neutron Capture Rate Constraint Far from Stability [Phys. Rev. Lett. 116, 242502 (2016)]. Phys Rev Lett 2019; 122:129902. [PMID: 30978071 DOI: 10.1103/physrevlett.122.129902] [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] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Indexed: 06/09/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.116.242502.
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11
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Spyrou A, Liddick SN, Naqvi F, Crider BP, Dombos AC, Bleuel DL, Brown BA, Couture A, Crespo Campo L, Guttormsen M, Larsen AC, Lewis R, Möller P, Mosby S, Mumpower MR, Perdikakis G, Prokop CJ, Renstrøm T, Siem S, Quinn SJ, Valenta S. Strong Neutron-γ Competition above the Neutron Threshold in the Decay of ^{70}Co. Phys Rev Lett 2016; 117:142701. [PMID: 27740831 DOI: 10.1103/physrevlett.117.142701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Indexed: 06/06/2023]
Abstract
The β-decay intensity of ^{70}Co was measured for the first time using the technique of total absorption spectroscopy. The large β-decay Q value [12.3(3) MeV] offers a rare opportunity to study β-decay properties in a broad energy range. Two surprising features were observed in the experimental results, namely, the large fragmentation of the β intensity at high energies, as well as the strong competition between γ rays and neutrons, up to more than 2 MeV above the neutron-separation energy. The data are compared to two theoretical calculations: the shell model and the quasiparticle random phase approximation (QRPA). Both models seem to be missing a significant strength at high excitation energies. Possible interpretations of this discrepancy are discussed. The shell model is used for a detailed nuclear structure interpretation and helps to explain the observed γ-neutron competition. The comparison to the QRPA calculations is done as a means to test a model that provides global β-decay properties for astrophysical calculations. Our work demonstrates the importance of performing detailed comparisons to experimental results, beyond the simple half-life comparisons. A realistic and robust description of the β-decay intensity is crucial for our understanding of nuclear structure as well as of r-process nucleosynthesis.
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Affiliation(s)
- A Spyrou
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - S N Liddick
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Naqvi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - B P Crider
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A C Dombos
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - D L Bleuel
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550-9234, USA
| | - B A Brown
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Couture
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - L Crespo Campo
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - M Guttormsen
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - A C Larsen
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - R Lewis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - P Möller
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S Mosby
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - M R Mumpower
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - G Perdikakis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- Central Michigan University, Mt. Pleasant, Michigan 48859, USA
| | - C J Prokop
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Renstrøm
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - S Siem
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - S J Quinn
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - S Valenta
- Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, CZ-180 00 Prague 8, Czech Republic
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Liddick SN, Spyrou A, Crider BP, Naqvi F, Larsen AC, Guttormsen M, Mumpower M, Surman R, Perdikakis G, Bleuel DL, Couture A, Crespo Campo L, Dombos AC, Lewis R, Mosby S, Nikas S, Prokop CJ, Renstrom T, Rubio B, Siem S, Quinn SJ. Experimental Neutron Capture Rate Constraint Far from Stability. Phys Rev Lett 2016; 116:242502. [PMID: 27367386 DOI: 10.1103/physrevlett.116.242502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 06/06/2023]
Abstract
Nuclear reactions where an exotic nucleus captures a neutron are critical for a wide variety of applications, from energy production and national security, to astrophysical processes, and nucleosynthesis. Neutron capture rates are well constrained near stable isotopes where experimental data are available; however, moving far from the valley of stability, uncertainties grow by orders of magnitude. This is due to the complete lack of experimental constraints, as the direct measurement of a neutron-capture reaction on a short-lived nucleus is extremely challenging. Here, we report on the first experimental extraction of a neutron capture reaction rate on ^{69}Ni, a nucleus that is five neutrons away from the last stable isotope of Ni. The implications of this measurement on nucleosynthesis around mass 70 are discussed, and the impact of similar future measurements on the understanding of the origin of the heavy elements in the cosmos is presented.
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Affiliation(s)
- S N Liddick
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Spyrou
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - B P Crider
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
| | - F Naqvi
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
| | - A C Larsen
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - M Guttormsen
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - M Mumpower
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
| | - R Surman
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - G Perdikakis
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - D L Bleuel
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550-9234, USA
| | - A Couture
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - L Crespo Campo
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - A C Dombos
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - R Lewis
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - S Mosby
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S Nikas
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - C J Prokop
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Renstrom
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - B Rubio
- IFIC, CSIC-Universidad de Valencia, 46071 Valencia, Spain
| | - S Siem
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - S J Quinn
- National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
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Jones MD, Kohley Z, Baumann T, Christian G, DeYoung PA, Finck JE, Frank N, Haring-Kaye RA, Kuchera AN, Luther B, Mosby S, Smith JK, Snyder J, Spyrou A, Stephenson SL, Thoennessen M. Search for 4 ncontributions in the reaction 14Be(CH 2,X) 10He. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611306006] [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: 11/14/2022] Open
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Spyrou A, Liddick SN, Larsen AC, Guttormsen M, Cooper K, Dombos AC, Morrissey DJ, Naqvi F, Perdikakis G, Quinn SJ, Renstrøm T, Rodriguez JA, Simon A, Sumithrarachchi CS, Zegers RGT. Novel technique for constraining r-process (n, γ) reaction rates. Phys Rev Lett 2014; 113:232502. [PMID: 25526121 DOI: 10.1103/physrevlett.113.232502] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Indexed: 06/04/2023]
Abstract
A novel technique has been developed, which will open exciting new opportunities for studying the very neutron-rich nuclei involved in the r process. As a proof of principle, the γ spectra from the β decay of ^{76}Ga have been measured with the SuN detector at the National Superconducting Cyclotron Laboratory. The nuclear level density and γ-ray strength function are extracted and used as input to Hauser-Feshbach calculations. The present technique is shown to strongly constrain the ^{75}Ge(n,γ)^{76}Ge cross section and reaction rate.
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Affiliation(s)
- A Spyrou
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - S N Liddick
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A C Larsen
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - M Guttormsen
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - K Cooper
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A C Dombos
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - D J Morrissey
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Naqvi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - G Perdikakis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Central Michigan University, Mount Pleasant, Michigan, 48859, USA
| | - S J Quinn
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Renstrøm
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - J A Rodriguez
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Simon
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and The Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - C S Sumithrarachchi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - R G T Zegers
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
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15
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Langer C, Montes F, Aprahamian A, Bardayan DW, Bazin D, Brown BA, Browne J, Crawford H, Cyburt RH, Domingo-Pardo C, Gade A, George S, Hosmer P, Keek L, Kontos A, Lee IY, Lemasson A, Lunderberg E, Maeda Y, Matos M, Meisel Z, Noji S, Nunes FM, Nystrom A, Perdikakis G, Pereira J, Quinn SJ, Recchia F, Schatz H, Scott M, Siegl K, Simon A, Smith M, Spyrou A, Stevens J, Stroberg SR, Weisshaar D, Wheeler J, Wimmer K, Zegers RGT. Determining the rp-process flow through 56Ni: resonances in 57Cu(p,γ)58Zn identified with GRETINA. Phys Rev Lett 2014; 113:032502. [PMID: 25083636 DOI: 10.1103/physrevlett.113.032502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Indexed: 06/03/2023]
Abstract
An approach is presented to experimentally constrain previously unreachable (p, γ) reaction rates on nuclei far from stability in the astrophysical rp process. Energies of all critical resonances in the (57)Cu(p,γ)(58)Zn reaction are deduced by populating states in (58)Zn with a (d, n) reaction in inverse kinematics at 75 MeV/u, and detecting γ-ray-recoil coincidences with the state-of-the-art γ-ray tracking array GRETINA and the S800 spectrograph at the National Superconducting Cyclotron Laboratory. The results reduce the uncertainty in the (57)Cu(p,γ) reaction rate by several orders of magnitude. The effective lifetime of (56)Ni, an important waiting point in the rp process in x-ray bursts, can now be determined entirely from experimentally constrained reaction rates.
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Affiliation(s)
- C Langer
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Montes
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Aprahamian
- Department of Physics and Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - D W Bardayan
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - D Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - B A Brown
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Browne
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - H Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - R H Cyburt
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | | | - A Gade
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - S George
- Ernst-Moritz-Arndt-Universität, 17487 Greifswald, Germany
| | - P Hosmer
- Department of Physics, Hillsdale College, Hillsdale, Michigan 49242, USA
| | - L Keek
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Kontos
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - I-Y Lee
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Lemasson
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Lunderberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Y Maeda
- Department of Applied Physics, University of Miyazaki, Miyazaki, Miyazaki 889-2192, Japan
| | - M Matos
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001, USA
| | - Z Meisel
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - S Noji
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - F M Nunes
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Nystrom
- Department of Physics and Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - G Perdikakis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - J Pereira
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - S J Quinn
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Recchia
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - H Schatz
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Scott
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - K Siegl
- Department of Physics and Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - A Simon
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Smith
- Department of Physics and Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - A Spyrou
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Stevens
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - S R Stroberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Weisshaar
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Wheeler
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - K Wimmer
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - R G T Zegers
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
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Langer C, Montes F, Aprahamian A, Bardayan DW, Bazin D, Brown B, Browne J, Crawford H, Cyburt R, Domingo-Pardo C, Gade A, George S, Hosmer P, Keek L, Kontos A, Lee IY, Lemasson A, Lunderberg E, Maeda Y, Matos M, Meisel Z, Noji S, Nystrom A, Perdikakis G, Pereira J, Quinn S, Recchia F, Schatz H, Scott M, Siegl K, Simon A, Smith M, Spyrou A, Stevens J, Stroberg R, Weisshaar D, Wheeler J, Wimmer K, Zegers R. Measurement of astrophysically important excitation energies of 58Zn with GRETINA. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146607013] [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: 11/14/2022] Open
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17
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Caiani E, Pellegrini A, Carminati M, Lang R, Auricchio A, Vaida P, Obase K, Sakakura T, Komeda M, Okura H, Yoshida K, Zeppellini R, Noni M, Rigo T, Erente G, Carasi M, Costa A, Ramondo B, Thorell L, Akesson-Lindow T, Shahgaldi K, Germanakis I, Fotaki A, Peppes S, Sifakis S, Parthenakis F, Makrigiannakis A, Richter U, Sveric K, Forkmann M, Wunderlich C, Strasser R, Djikic D, Potpara T, Polovina M, Marcetic Z, Peric V, Ostenfeld E, Werther-Evaldsson A, Engblom H, Ingvarsson A, Roijer A, Meurling C, Holm J, Radegran G, Carlsson M, Tabuchi H, Yamanaka T, Katahira Y, Tanaka M, Kurokawa T, Nakajima H, Ohtsuki S, Saijo Y, Yambe T, D'alto M, Romeo E, Argiento P, D'andrea A, Vanderpool R, Correra A, Sarubbi B, Calabro' R, Russo M, Naeije R, Saha SK, Warsame TA, Caelian AG, Malicse M, Kiotsekoglou A, Omran AS, Sharif D, Sharif-Rasslan A, Shahla C, Khalil A, Rosenschein U, Erturk M, Oner E, Kalkan A, Pusuroglu H, Ozyilmaz S, Akgul O, Aksu H, Akturk F, Celik O, Uslu N, Bandera F, Pellegrino M, Generati G, Donghi V, Alfonzetti E, Guazzi M, Rangel I, Goncalves A, Sousa C, Correia A, Martins E, Silva-Cardoso J, Macedo F, Maciel M, Lee S, Kim W, Yun H, Jung L, Kim E, Ko J, Enescu O, Florescu M, Rimbas R, Cinteza M, Vinereanu D, Kosmala W, Rojek A, Cielecka-Prynda M, Laczmanski L, Mysiak A, Przewlocka-Kosmala M, Liu D, Hu K, Niemann M, Herrmann S, Cikes M, Gaudron P, Knop S, Ertl G, Bijnens B, Weidemann F, Saravi M, Tamadoni A, Jalalian R, Hojati M, Ramezani S, Yildiz A, Inci U, Bilik M, Yuksel M, Oyumlu M, Kayan F, Ozaydogdu N, Aydin M, Akil M, Tekbas E, Shang Q, Zhang Q, Fang F, Wang S, Li R, Lee AP, Yu C, Mornos C, Ionac A, Cozma D, Popescu I, Ionescu G, Dan R, Petrescu L, Sawant A, Srivatsa S, Adhikari P, Mills P, Srivatsa S, Boshchenko A, Vrublevsky A, Karpov R, Trifunovic D, Stankovic S, Vujisic-Tesic B, Petrovic M, Nedeljkovic I, Banovic M, Tesic M, Petrovic M, Dragovic M, Ostojic M, Zencirci E, Esen Zencirci A, Degirmencioglu A, Karakus G, Ekmekci A, Erdem A, Ozden K, Erer H, Akyol A, Eren M, Zamfir D, Tautu O, Onciul S, Marinescu C, Onut R, Comanescu I, Oprescu N, Iancovici S, Dorobantu M, Melao F, Pereira M, Ribeiro V, Oliveira S, Araujo C, Subirana I, Marrugat J, Dias P, Azevedo A, Grillo MT, Piamonti B, Abate E, Porto A, Dell'angela L, Gatti G, Poletti A, Pappalardo A, Sinagra G, Pinto-Teixeira P, Galrinho A, Branco L, Fiarresga A, Sousa L, Cacela D, Portugal G, Rio P, Abreu J, Ferreira R, Fadel B, Abdullah N, Al-Admawi M, Pergola V, Bech-Hanssen O, Di Salvo G, Tigen MK, Pala S, Karaahmet T, Dundar C, Bulut M, Izgi A, Esen AM, Kirma C, Boerlage-Van Dijk K, Yamawaki M, Wiegerinck E, Meregalli P, Bindraban N, Vis M, Koch K, Piek J, Bouma B, Baan J, Mizia M, Sikora-Puz A, Gieszczyk-Strozik K, Lasota B, Chmiel A, Chudek J, Jasinski M, Deja M, Mizia-Stec K, Silva Fazendas Adame PR, Caldeira D, Stuart B, Almeida S, Cruz I, Ferreira A, Lopes L, Joao I, Cotrim C, Pereira H, Unger P, Dedobbeleer C, Stoupel E, Preumont N, Argacha J, Berkenboom G, Van Camp G, Malev E, Reeva S, Vasina L, Pshepiy A, Korshunova A, Timofeev E, Zemtsovsky E, Jorgensen PG, Jensen J, Fritz-Hansen T, Biering-Sorensen T, Jons C, Olsen N, Henri C, Magne J, Dulgheru R, Laaraibi S, Voilliot D, Kou S, Pierard L, Lancellotti P, Tayyareci Y, Dworakowski R, Kogoj P, Reiken J, Kenny C, Maccarthy P, Wendler O, Monaghan M, Song J, Ha T, Jung Y, Seo M, Choi S, Kim Y, Sun B, Kim D, Kang D, Song J, Le Tourneau T, Topilsky Y, Inamo J, Mahoney D, Suri R, Schaff H, Enriquez-Sarano M, Bonaque Gonzalez J, Sanchez Espino A, Merchan Ortega G, Bolivar Herrera N, Ikuta I, Macancela Quinonez J, Munoz Troyano S, Ferrer Lopez R, Gomez Recio M, Dreyfus J, Cimadevilla C, Brochet E, Himbert D, Iung B, Vahanian A, Messika-Zeitoun D, Izumo M, Takeuchi M, Seo Y, Yamashita E, Suzuki K, Ishizu T, Sato K, Aonuma K, Otsuji Y, Akashi Y, Muraru D, Addetia K, Veronesi F, Corsi C, Mor-Avi V, Yamat M, Weinert L, Lang R, Badano L, Minamisawa M, Koyama J, Kozuka A, Motoki H, Izawa A, Tomita T, Miyashita Y, Ikeda U, Florescu C, Niemann M, Liu D, Hu K, Herrmann S, Gaudron P, Scholz F, Stoerk S, Ertl G, Weidemann F, Marchel M, Serafin A, Kochanowski J, Piatkowski R, Madej-Pilarczyk A, Filipiak K, Hausmanowa-Petrusewicz I, Opolski G, Meimoun P, M'barek D, Clerc J, Neikova A, Elmkies F, Tzvetkov B, Luycx-Bore A, Cardoso C, Zemir H, Mansencal N, Arslan M, El Mahmoud R, Pilliere R, Dubourg O, Ikonomidis I, Lambadiari V, Pavlidis G, Koukoulis C, Kousathana F, Varoudi M, Tritakis V, Triantafyllidi H, Dimitriadis G, Lekakis I, Kovacs A, Kosztin A, Solymossy K, Celeng C, Apor A, Faludi M, Berta K, Szeplaki G, Foldes G, Merkely B, Kimura K, Daimon M, Nakajima T, Motoyoshi Y, Komori T, Nakao T, Kawata T, Uno K, Takenaka K, Komuro I, Gabric ID, Vazdar L, Pintaric H, Planinc D, Vinter O, Trbusic M, Bulj N, Nobre Menezes M, Silva Marques J, Magalhaes R, Carvalho V, Costa P, Brito D, Almeida A, Nunes-Diogo A, Davidsen ES, Bergerot C, Ernande L, Barthelet M, Thivolet S, Decker-Bellaton A, Altman M, Thibault H, Moulin P, Derumeaux G, Huttin O, Voilliot D, Frikha Z, Aliot E, Venner C, Juilliere Y, Selton-Suty C, Yamada T, Ooshima M, Hayashi H, Okabe S, Johno H, Murata H, Charalampopoulos A, Tzoulaki I, Howard L, Davies R, Gin-Sing W, Grapsa J, Wilkins M, Gibbs J, Castillo J, Bandeira A, Albuquerque E, Silveira C, Pyankov V, Chuyasova Y, Lichodziejewska B, Goliszek S, Kurnicka K, Dzikowska Diduch O, Kostrubiec M, Krupa M, Grudzka K, Ciurzynski M, Palczewski P, Pruszczyk P, Arana X, Oria G, Onaindia J, Rodriguez I, Velasco S, Cacicedo A, Palomar S, Subinas A, Zumalde J, Laraudogoitia E, Saeed S, Kokorina M, Fromm A, Oeygarden H, Waje-Andreassen U, Gerdts E, Gomez E, Vallejo N, Pedro-Botet L, Mateu L, Nunyez R, Llobera L, Bayes A, Sabria M, Antonini-Canterin F, Mateescu A, La Carrubba S, Vriz O, Di Bello V, Carerj S, Zito C, Ginghina C, Popescu B, Nicolosi G, Mateescu A, La Carrubba S, Vriz O, Di Bello V, Carerj S, Zito C, Ginghina C, Popescu B, Nicolosi G, Antonini-Canterin F, Pudil R, Praus R, Vasatova M, Vojacek J, Palicka V, Hulek P, Pradel S, Mohty D, Damy T, Echahidi N, Lavergne D, Virot P, Aboyans V, Jaccard A, Mateescu A, La Carrubba S, Vriz O, Di Bello V, Carerj S, Zito C, Ginghina C, Popescu B, Nicolosi G, Antonini-Canterin F, Doulaptsis C, Symons R, Matos A, Florian A, Masci P, Dymarkowski S, Janssens S, Bogaert J, Lestuzzi C, Moreo A, Celik S, Lafaras C, Dequanter D, Tomkowski W, De Biasio M, Cervesato E, Massa L, Imazio M, Watanabe N, Kijima Y, Akagi T, Toh N, Oe H, Nakagawa K, Tanabe Y, Ikeda M, Okada K, Ito H, Milanesi O, Biffanti R, Varotto E, Cerutti A, Reffo E, Castaldi B, Maschietto N, Vida V, Padalino M, Stellin G, Bejiqi R, Retkoceri R, Bejiqi H, Retkoceri A, Surdulli S, Massoure P, Cautela J, Roche N, Chenilleau M, Gil J, Fourcade L, Akhundova A, Cincin A, Sunbul M, Sari I, Tigen M, Basaran Y, Suermeci G, Butz T, Schilling I, Sasko B, Liebeton J, Van Bracht M, Tzikas S, Prull M, Wennemann R, Trappe H, Attenhofer Jost CH, Pfyffer M, Scharf C, Seifert B, Faeh-Gunz A, Naegeli B, Candinas R, Medeiros-Domingo A, Wierzbowska-Drabik K, Roszczyk N, Sobczak M, Plewka M, Krecki R, Kasprzak J, Ikonomidis I, Varoudi M, Papadavid E, Theodoropoulos K, Papadakis I, Pavlidis G, Triantafyllidi H, Anastasiou - Nana M, Rigopoulos D, Lekakis J, Tereshina O, Surkova E, Vachev A, Merchan Ortega G, Bonaque Gonzalez J, Sanchez Espino A, Bolivar Herrera N, Bravo Bustos D, Ikuta I, Aguado Martin M, Navarro Garcia F, Ruiz Lopez F, Gomez Recio M, Merchan Ortega G, Bonaque Gonzalez J, Bravo Bustos D, Sanchez Espino A, Bolivar Herrera N, Bonaque Gonzalez J, Navarro Garcia F, Aguado Martin M, Ruiz Lopez M, Gomez Recio M, Eguchi H, Maruo T, Endo K, Nakamura K, Yokota K, Fuku Y, Yamamoto H, Komiya T, Kadota K, Mitsudo K, Nagy AI, Manouras A, Gunyeli E, Shahgaldi K, Winter R, Hoffmann R, Barletta G, Von Bardeleben S, Kasprzak J, Greis C, Vanoverschelde J, Becher H, Hu K, Liu D, Niemann M, Herrmann S, Cikes M, Gaudron P, Knop S, Ertl G, Bijnens B, Weidemann F, Di Salvo G, Al Bulbul Z, Issa Z, Khan A, Faiz A, Rahmatullah S, Fadel B, Siblini G, Al Fayyadh M, Menting ME, Van Den Bosch A, Mcghie J, Cuypers J, Witsenburg M, Van Dalen B, Geleijnse M, Roos-Hesselink J, Olsen F, Jorgensen P, Mogelvang R, Jensen J, Fritz-Hansen T, Bech J, Biering-Sorensen T, Agoston G, Pap R, Saghy L, Forster T, Varga A, Scandura S, Capodanno D, Dipasqua F, Mangiafico S, Caggegi AM, Grasso C, Pistritto AM, Imme' S, Ministeri M, Tamburino C, Cameli M, Lisi M, D'ascenzi F, Cameli P, Losito M, Sparla S, Lunghetti S, Favilli R, Fineschi M, Mondillo S, Ojaghihaghighi Z, Javani B, Haghjoo M, Moladoust H, Shahrzad S, Ghadrdoust B, Altman M, Aussoleil A, Bergerot C, Bonnefoy-Cudraz E, Derumeaux GA, Thibault H, Shkolnik E, Vasyuk Y, Nesvetov V, Shkolnik L, Varlan G, Gronkova N, Kinova E, Borizanova A, Goudev A, Saracoglu E, Ural D, Sahin T, Al N, Cakmak H, Akbulut T, Akay K, Ural E, Mushtaq S, Andreini D, Pontone G, Bertella E, Conte E, Baggiano A, Annoni A, Formenti A, Fiorentini C, Pepi M, Cosgrove C, Carr L, Chao C, Dahiya A, Prasad S, Younger J, Biering-Sorensen T, Christensen L, Krieger D, Mogelvang R, Jensen J, Hojberg S, Host N, Karlsen F, Christensen H, Medressova A, Abikeyeva L, Dzhetybayeva S, Andossova S, Kuatbayev Y, Bekbossynova M, Bekbossynov S, Pya Y, Farsalinos K, Tsiapras D, Kyrzopoulos S, Spyrou A, Stefopoulos C, Romagna G, Tsimopoulou K, Tsakalou M, Voudris V, Cacicedo A, Velasco Del Castillo S, Anton Ladislao A, Aguirre Larracoechea U, Onaindia Gandarias J, Romero Pereiro A, Arana Achaga X, Zugazabeitia Irazabal G, Laraudogoitia Zaldumbide E, Lekuona Goya I, Varela A, Kotsovilis S, Salagianni M, Andreakos V, Davos C, Merchan Ortega G, Bonaque Gonzalez J, Sanchez Espino A, Bolivar Herrera N, Macancela Quinones J, Ikuta I, Ferrer Lopez R, Munoz Troyano S, Bravo Bustos D, Gomez Recio M. Poster session Friday 13 December - PM: 13/12/2013, 14:00-18:00 * Location: Poster area. Eur Heart J Cardiovasc Imaging 2013. [DOI: 10.1093/ehjci/jet206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Bennett MB, Wrede C, Chipps KA, José J, Liddick SN, Santia M, Bowe A, Chen AA, Cooper N, Irvine D, McNeice E, Montes F, Naqvi F, Ortez R, Pain SD, Pereira J, Prokop C, Quaglia J, Quinn SJ, Schwartz SB, Shanab S, Simon A, Spyrou A, Thiagalingam E. Classical-NOVA CONTRIBUTION to the Milky Way's ²⁶Al abundance: exit channel of the key ²⁵Al(p,γ) ²⁶Si resonance. Phys Rev Lett 2013; 111:232503. [PMID: 24476263 DOI: 10.1103/physrevlett.111.232503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/07/2013] [Indexed: 06/03/2023]
Abstract
Classical novae are expected to contribute to the 1809-keV Galactic γ-ray emission by producing its precursor 26Al, but the yield depends on the thermonuclear rate of the unmeasured 25Al(p,γ)26Si reaction. Using the β decay of 26P to populate the key J(π)=3(+) resonance in this reaction, we report the first evidence for the observation of its exit channel via a 1741.6±0.6(stat)±0.3(syst) keV primary γ ray, where the uncertainties are statistical and systematic, respectively. By combining the measured γ-ray energy and intensity with other experimental data on 26Si, we find the center-of-mass energy and strength of the resonance to be E(r)=414.9±0.6(stat)±0.3(syst)±0.6(lit.) keV and ωγ=23±6(stat)(-10)(+11)(lit.) meV, respectively, where the last uncertainties are from adopted literature data. We use hydrodynamic nova simulations to model 26Al production showing that these measurements effectively eliminate the dominant experimental nuclear-physics uncertainty and we estimate that novae may contribute up to 30% of the Galactic 26Al.
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Affiliation(s)
- M B Bennett
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Wrede
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - K A Chipps
- Department of Physics, Colorado School of Mines, Golden, Colorado 08401, USA
| | - J José
- Departament Física i Enginyeria Nuclear (UPC) and Institut d'Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain
| | - S N Liddick
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Santia
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Bowe
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Physics Department, Kalamazoo College, Kalamazoo, Michigan 49006, USA
| | - A A Chen
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - N Cooper
- Department of Physics and Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - D Irvine
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - E McNeice
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - F Montes
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Naqvi
- Department of Physics and Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - R Ortez
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - S D Pain
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J Pereira
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Prokop
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Quaglia
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA and Department of Electrical Engineering, Michigan State University, East Lansing, Michigan 48824, USA
| | - S J Quinn
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - S B Schwartz
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Geology and Physics Department, University of Southern Indiana, Evansville, Indiana 47712, USA
| | - S Shanab
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Simon
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Spyrou
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Thiagalingam
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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Farsalinos K, Tsiapras D, Kyrzopoulos S, Stefopoulos C, Spyrou A, Tsakalou M, Avramidou E, Vasilopoulou D, Romagna G, Voudris V. Immediate effects of electronic cigarette use on coronary circulation and blood carboxyhemoglobin levels: comparison with cigarette smoking. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.102] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Akers C, Laird AM, Fulton BR, Ruiz C, Bardayan DW, Buchmann L, Christian G, Davids B, Erikson L, Fallis J, Hager U, Hutcheon D, Martin L, Murphy ASJ, Nelson K, Spyrou A, Stanford C, Ottewell D, Rojas A. Measurement of radiative proton capture on 18F and implications for oxygen-neon novae. Phys Rev Lett 2013; 110:262502. [PMID: 23848867 DOI: 10.1103/physrevlett.110.262502] [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: 01/21/2013] [Indexed: 06/02/2023]
Abstract
The rate of the 18F(p,γ)19Ne reaction affects the final abundance of the γ-ray observable radioisotope 18F, produced in novae. However, no successful measurement of this reaction exists and the rate used is calculated from incomplete information on the contributing resonances. Of the two resonances thought to play a significant role, one has a radiative width estimated from the assumed analogue state in the mirror nucleus, 19F. The second does not have an analogue state assignment at all, resulting in an arbitrary radiative width being assumed. Here, we report the first successful direct measurement of the 18F(p,γ)^19Ne reaction. The strength of the 665 keV resonance (Ex=7.076 MeV) is found to be over an order of magnitude weaker than currently assumed in nova models. Reaction rate calculations show that this resonance therefore plays no significant role in the destruction of ^{18}F at any astrophysical energy.
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Affiliation(s)
- C Akers
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
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21
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Spyrou A, Vlachos P. P387: Comparison of antiseptic solutions effectiveness in the hospital environment. Antimicrob Resist Infect Control 2013. [PMCID: PMC3688489 DOI: 10.1186/2047-2994-2-s1-p387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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22
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Kohley Z, Baumann T, Bazin D, Christian G, DeYoung PA, Finck JE, Frank N, Jones M, Lunderberg E, Luther B, Mosby S, Nagi T, Smith JK, Snyder J, Spyrou A, Thoennessen M. Study of two-neutron radioactivity in the decay of 26O. Phys Rev Lett 2013; 110:152501. [PMID: 25167255 DOI: 10.1103/physrevlett.110.152501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Indexed: 06/03/2023]
Abstract
A new technique was developed to measure the lifetimes of neutron unbound nuclei in the picosecond range. The decay of 26O→24O+n+n was examined as it had been predicted to have an appreciable lifetime due to the unique structure of the neutron-rich oxygen isotopes. The half-life of 26O was extracted as 4.5(-1.5)(+1.1)(stat)±3(syst) ps. This corresponds to 26O having a finite lifetime at an 82% confidence level and, thus, suggests the possibility of two-neutron radioactivity.
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Affiliation(s)
- Z Kohley
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Baumann
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - G Christian
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - P A DeYoung
- Department of Physics, Hope College, Holland, Michigan 49423, USA
| | - J E Finck
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - N Frank
- Department of Physics and Astronomy, Augustana College, Rock Island, Illinois 61201, USA
| | - M Jones
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Lunderberg
- Department of Physics, Hope College, Holland, Michigan 49423, USA
| | - B Luther
- Department of Physics, Concordia College, Moorhead, Minnesota 56562, USA
| | - S Mosby
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Nagi
- Department of Physics, Hope College, Holland, Michigan 49423, USA
| | - J K Smith
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Snyder
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Spyrou
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Thoennessen
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
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Spyrou A, Trikilis J, Panagiotou C. P230: The effect of health care-associated infections in the outcome of patients with heart failure. Antimicrob Resist Infect Control 2013. [PMCID: PMC3688032 DOI: 10.1186/2047-2994-2-s1-p230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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24
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Kohley Z, Snyder J, Baumann T, Christian G, DeYoung PA, Finck JE, Haring-Kaye RA, Jones M, Lunderberg E, Luther B, Mosby S, Simon A, Smith JK, Spyrou A, Stephenson SL, Thoennessen M. Unresolved question of the 10He ground state resonance. Phys Rev Lett 2012; 109:232501. [PMID: 23368186 DOI: 10.1103/physrevlett.109.232501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Indexed: 06/01/2023]
Abstract
The ground state of (10)He was populated using a 2p2n-removal reaction from a 59 MeV/u (14)Be beam. The decay energy of the three-body system, (8)He+n+n, was measured and a resonance was observed at E=1.60(25) MeV with a 1.8(4) MeV width. This result is in agreement with previous invariant mass spectroscopy measurements, using the (11)Li(-p) reaction, but is inconsistent with recent transfer reaction results. The proposed explanation that the difference, about 500 keV, is due to the effect of the extended halo nature of (11)Li in the one-proton knockout reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction results persists despite using a very different reaction mechanism, (14)Be(-2p2n).
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Affiliation(s)
- Z Kohley
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
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25
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Lunderberg E, DeYoung PA, Kohley Z, Attanayake H, Baumann T, Bazin D, Christian G, Divaratne D, Grimes SM, Haagsma A, Finck JE, Frank N, Luther B, Mosby S, Nagi T, Peaslee GF, Schiller A, Snyder J, Spyrou A, Strongman MJ, Thoennessen M. Evidence for the ground-state resonance of 26O. Phys Rev Lett 2012; 108:142503. [PMID: 22540789 DOI: 10.1103/physrevlett.108.142503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Indexed: 05/31/2023]
Abstract
Evidence for the ground state of the neutron-unbound nucleus (26)O was observed for the first time in the single proton-knockout reaction from a 82 MeV/u (27)F beam. Neutrons were measured in coincidence with (24)O fragments. (26)O was determined to be unbound by 150(-150)(+50) keV from the observation of low-energy neutrons. This result agrees with recent shell-model calculations based on microscopic two- and three-nucleon forces.
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Affiliation(s)
- E Lunderberg
- Department of Physics, Hope College, Holland, Michigan 49423, USA
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26
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Spyrou A, Kohley Z, Baumann T, Bazin D, Brown BA, Christian G, DeYoung PA, Finck JE, Frank N, Lunderberg E, Mosby S, Peters WA, Schiller A, Smith JK, Snyder J, Strongman MJ, Thoennessen M, Volya A. First observation of ground state dineutron decay: 16Be. Phys Rev Lett 2012; 108:102501. [PMID: 22463404 DOI: 10.1103/physrevlett.108.102501] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Indexed: 05/31/2023]
Abstract
We report on the first observation of dineutron emission in the decay of 16Be. A single-proton knockout reaction from a 53 MeV/u 17B beam was used to populate the ground state of 16Be. 16Be is bound with respect to the emission of one neutron and unbound to two-neutron emission. The dineutron character of the decay is evidenced by a small emission angle between the two neutrons. The two-neutron separation energy of 16Be was measured to be 1.35(10) MeV, in good agreement with shell model calculations, using standard interactions for this mass region.
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Affiliation(s)
- A Spyrou
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
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Abstract
Invariant mass measurements and breakup reactions of neutron-rich nuclei have been instrumental in the study of nuclear structure effects at the limit of nuclear existence. The measurements of neutron-unbound states rely on the detection of neutrons in coincidence with fragments at energies between 100 and 1000 MeV/u. Charged particle and γ-ray coincidence measurements yield additional information. The production and detection methods for these experiments and examples of results in light nuclei are presented. Future opportunities with new facilities and the development of new detectors are described.
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Affiliation(s)
- T Baumann
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321, USA.
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28
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Christian G, Frank N, Ash S, Baumann T, Bazin D, Brown J, DeYoung PA, Finck JE, Gade A, Grinyer GF, Grovom A, Hinnefeld JD, Lunderberg EM, Luther B, Mosby M, Mosby S, Nagi T, Peaslee GF, Rogers WF, Smith JK, Snyder J, Spyrou A, Strongman MJ, Thoennessen M, Warren M, Weisshaar D, Wersal A. Exploring the low-Z shore of the island of inversion at n=19. Phys Rev Lett 2012; 108:032501. [PMID: 22400733 DOI: 10.1103/physrevlett.108.032501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Indexed: 05/31/2023]
Abstract
The technique of invariant mass spectroscopy has been used to measure, for the first time, the ground state energy of neutron-unbound (28)F, determined to be a resonance in the (27)F+n continuum at 220(50) keV. States in (28)F were populated by the reactions of a 62 MeV/u (29)Ne beam impinging on a 288 mg/cm(2) beryllium target. The measured (28)F ground state energy is in good agreement with USDA/USDB shell model predictions, indicating that pf shell intruder configurations play only a small role in the ground state structure of (28)F and establishing a low-Z boundary of the island of inversion for N=19 isotones.
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Affiliation(s)
- G Christian
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
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Guttormsen M, Larsen A, Bürger A, Görgen A, Nyhus H, Siem S, Syed N, Toft H, Tveten G, Harissopulos S, Konstantinopoulos T, Lagoyannis A, Perdikakis G, Spyrou A, Kmiecik M, Mazurek K, Krtička T, Lönnroth T, Norrby M, Schiller A, Voinov A. Do light nuclei display a universal γ-ray strength function? EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20122104004] [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: 11/14/2022] Open
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30
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Spyrou A, Triklis J, Panagiotou C. Incidence o fmicrobial colonization in coronoray care unit. BMC Proc 2011. [PMCID: PMC3239811 DOI: 10.1186/1753-6561-5-s6-p75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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31
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Spyrou A, Triklis J, Aggelpopoulou Z, Tsiodras S, Saroglou G. Tracheobroncial colonization in coronary care unit intubated patients. BMC Proc 2011. [PMCID: PMC3239802 DOI: 10.1186/1753-6561-5-s6-p67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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Spyrou A, Papadakis E, Mpanti A, Loukidhs K, Efraimidou S, Tsimirika K, Gatsa E, Karagianni A, Georgiern E, Kioumi A, Korantzis I. P.67 Type and location of thromboembolism in females carrying FV Leiden mutation during pregnancy/puerperium or oral contraceptive/hormone replacement therapy: experience from a single center. Thromb Res 2011. [DOI: 10.1016/s0049-3848(11)70122-0] [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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33
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Papadakis E, Tsimirika K, Gatsa E, Spyrou A, Loukidhs K, Karagianni A, Georgiou E, Efraimidou S, Kioumi A, Korantzis I. P.68 Hormone related thrombosis in a male presenting idiopathic oligoasthenoteratozoospermia (iOAT). Thromb Res 2011. [DOI: 10.1016/s0049-3848(11)70123-2] [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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34
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Bürger A, Larsen A, Syed N, Guttormsen M, Harissopulos S, Kmiecik M, Konstantinopoulos T, Krtička M, Lagoyannis A, Lönnroth T, Mazurek K, Norby M, Nyhus H, Perdikakis G, Siem S, Spyrou A, Voinov A. Level Densities and γStrength Functions in Light Sc and Ti Isotopes. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100203003] [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: 11/14/2022] Open
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35
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Efremidou S, Papadakis E, Kokoviadou K, Spyrou A, Loukidis K, Topalidou M, Korantzis K. P46 Prevalence and morbidity of congenital thrombophilia in 75 women with an adverse pregnancy outcome. Thromb Res 2009. [DOI: 10.1016/s0049-3848(09)70091-x] [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: 11/28/2022]
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Perdikakis G, Papadopoulos CT, Kokkoris M, Vlastou R, Galanopoulos S, Lagoyannis A, Spyrou A, Kalyva G, Patronis N. Study of the 241Am(n,2n)240Am reaction cross section in the energy range of E n = 8.8−11.1 MeV. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-007-0504-7] [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: 10/23/2022]
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Apostolou F, Kostoula A, Liberopoulos E, Gazi I, Spyrou A, Tsianos E, Bairaktari E, Tselepis A, Elisaf M. P813 Alterations of serum lipoproteins in patients with acute brucellosis. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70654-4] [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: 11/25/2022]
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Dimitriou V, Spyrou A, Ioakimidou A, Stranomiti J, Koursoumi E, Atsalakis J, Saranteas T. The influence of premedication and smoking. Middle East J Anaesthesiol 2006; 18:943-6. [PMID: 17094533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The history of smoking and premedication did not influence the proportion of patients who had a cough response to fentanyl when administrated as first agent during induction in anesthesia.
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Affiliation(s)
- V Dimitriou
- Department of Anaesthesia, G Genimmatas General Hospital of Athens, Athens, Greece.
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Gazi I, Tzovaras V, Liberopoulos E, Tsouli S, Spyrou A, Tselepis A, Elisaf M. Th-P15:32 The apolipoprotein B/apolipoprotein A1 ratio in metabolic syndrome. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81992-6] [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: 10/23/2022]
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