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Liu A, Garg R, Steinberg J, Odono L, Hammoudeh J. Microvascular Mandibular Reconstruction with an Endoprosthesis: Optimizing Bone Height and Border Contour. J Oral Maxillofac Surg 2020. [DOI: 10.1016/j.joms.2020.07.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Manna A, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano VS, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calvi F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Coséntino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Goncalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtiička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada J, Ramos D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith A, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeno-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Setup for the measurement of the 235U(n, f) cross section relative to n-p scattering up to 1 GeV. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023901008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The neutron induced fission of 235U is extensively used as a reference for neutron fluence measurements in various applications, ranging from the investigation of the biological effectiveness of high energy neutrons, to the measurement of high energy neutron cross sections of relevance for accelerator driven nuclear systems. Despite its widespread use, no data exist on neutron induced fission of 235U above 200 MeV. The neutron facility n_TOF offers the possibility to improve the situation. The measurement of 235U(n,f) relative to the differential n-p scattering cross-section, was carried out in September 2018 with the aim of providing accurate and precise cross section data in the energy range from 10 MeV up to 1 GeV. In such measurements, Recoil Proton Telescopes (RPTs) are used to measure the neutron flux while the fission events are detected and counted with dedicated detectors. In this paper the measurement campaign and the experimental set-up are illustrated.
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Terranova N, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Monte Carlo simulations and n-p differential scattering data measured with Proton Recoil Telescopes. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023901024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The neutron-induced fission cross section of 235U, a standard at thermal energy and between 0.15 MeV and 200 MeV, plays a crucial role in nuclear technology applications. The long-standing need of improving cross section data above 20 MeV and the lack of experimental data above 200 MeV motivated a new experimental campaign at the n_TOF facility at CERN. The measurement has been performed in 2018 at the experimental area 1 (EAR1), located at 185 m from the neutron-producing target (the experiment is presented by A. Manna et al. in a contribution to this conference). The 235U(n,f) cross section from 20 MeV up to about 1 GeV has been measured relative to the 1H(n,n)1H reaction, which is considered the primary reference in this energy region. The neutron flux impinging on the 235U sample (a key quantity for determining the fission events) has been obtained by detecting recoil protons originating from n-p scattering in a C2H4 sample. Two Proton Recoil Telescopes (PRT), consisting of several layers of solid-state detectors and fast plastic scintillators, have been located at proton scattering angles of 25.07° and 20.32°, out of the neutron beam. The PRTs exploit the ΔE-E technique for particle identification, a basic requirement for the rejection of charged particles from neutron-induced reactions in carbon. Extensive Monte Carlo simulations were performed to characterize proton transport through the different slabs of silicon and scintillation detectors, to optimize the experimental set-up and to deduce the efficiency of the whole PRT detector. In this work we compare measured data collected with the PRTs with a full Monte Carlo simulation based on the Geant-4 toolkit.
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Andrews BT, Garg R, Przylecki W, Habal M. COVID-19 Pandemic and its Impact on Craniofacial Surgery. J Craniofac Surg 2020; 31:e620-e622. [PMID: 32398624 PMCID: PMC7282405 DOI: 10.1097/scs.0000000000006574] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 03/31/2020] [Indexed: 11/26/2022] Open
Abstract
In late 2019, a novel coronavirus strain, SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), also known as coronavirus disease 2019 (COVID-19), triggered a global pandemic as the virus spread from the Wuhan Province, China, across all continents. Although infrequent, severe respiratory infection and death caused by SARS-CoV-2 is disproportionately high amongst healthcare providers such as craniofacial surgeons who work in the head and neck region. Factors this impact SARS-CoV-2 transmission include: (1) high viral loads in the mucosa of the oral and nasopharynx, (2) limited and/or imprecise disease screening/confirmation testing, (3) access to and appropriate use of personal protective equipment (PPE).
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Kayle M, Valle J, Paulukonis S, Holl JL, Tanabe P, French DD, Garg R, Liem RI, Badawy SM, Treadwell MJ. Impact of Medicaid expansion on access and healthcare among individuals with sickle cell disease. Pediatr Blood Cancer 2020; 67:e28152. [PMID: 32147964 PMCID: PMC7096276 DOI: 10.1002/pbc.28152] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 12/03/2019] [Accepted: 12/13/2019] [Indexed: 11/05/2022]
Abstract
PURPOSE Sickle cell disease (SCD) is associated with high acute healthcare utilization. The purpose of this study was to examine whether Medicaid expansion in California increased Medicaid enrollment, increased hydroxyurea prescriptions filled, and decreased acute healthcare utilization in SCD. METHODS Individuals with SCD (≤65 years and enrolled in Medicaid for ≥6 total calendar months any year between 2011 and 2016) were identified in a multisource database maintained by the California Sickle Cell Data Collection Program. We describe trends and changes in Medicaid enrollment, hydroxyurea prescriptions filled, and emergency department (ED) visits and hospital admissions before (2011-2013) and after (2014-2016) Medicaid expansion in California. RESULTS The cohort included 3635 individuals. Enrollment was highest in 2014 and lowest in 2016 with a 2.8% annual decease postexpansion. Although <20% of the cohort had a hydroxyurea prescription filled, the percentage increased by 5.2% annually after 2014. The ED visit rate was highest in 2014 and decreased slightly in 2016, decreasing by 1.1% annually postexpansion. Hospital admission rates were similar during the pre- and postexpansion periods. Young adults and adults had higher ED and hospital admission rates than children and adolescents. CONCLUSIONS Medicaid expansion does not appear to have improved enrollment or acute healthcare utilization among individuals with SCD in California. Future studies should explore whether individuals with SCD transitioned to other insurance plans or became uninsured postexpansion, the underlying reasons for low hydroxyurea utilization, and the lack of effect on hospital admissions despite a modest effect on ED visits.
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Caria G, Urquijo P, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Babu V, Badhrees I, Bahinipati S, Bakich AM, Behera P, Beleño C, Bennett J, Bhuyan B, Bilka T, Biswal J, Bozek A, Bračko M, Browder TE, Campajola M, Červenkov D, Chang P, Cheaib R, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, De Nardo G, Di Capua F, Di Carlo S, Doležal Z, Dong TV, Eidelman S, Epifanov D, Fast JE, Ferber T, Ferlewicz D, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Greenwald D, Grzymkowska O, Guan Y, Hartbrich O, Hayasaka K, Hayashii H, Higuchi T, Hou WS, Hsu CL, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Kaliyar AB, Kang KH, Karyan G, Kawasaki T, Kichimi H, Kim CH, Kim DY, Kim HJ, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krohn JF, Krokovny P, Kuhr T, Kumar R, Kwon YJ, Lange JS, Lee IS, Lee JK, Lee SC, Li LK, Li YB, Li Gioi L, Libby J, Lieret K, Liventsev D, Luo T, MacQueen C, Masuda M, Matsuda T, Matvienko D, Merola M, Metzner F, Miyabayashi K, Mohanty GB, Moon TJ, Mori T, Mussa R, Nakamura KR, Nakao M, Nath KJ, Nayak M, Nisar NK, Nishida S, Nishimura K, Ogawa K, Ono H, Onuki Y, Oskin P, Pakhlov P, Pakhlova G, Pal B, Pang T, Park H, Park SH, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Popov V, Prencipe E, Prim MT, Rabusov A, Resmi PK, Ritter M, Rozanska M, Russo G, Sahoo D, Sakai Y, Sandilya S, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Sevior ME, Shebalin V, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Stottler ZS, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uglov T, Uno S, Usov Y, Vahsen SE, Van Tonder R, Varner G, Varvell KE, Vossen A, Waheed E, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Watanuki S, Wiechczynski J, Won E, Yamamoto H, Yang SB, Ye H, Yin JH, Yuan CZ, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V. Measurement of R(D) and R(D^{*}) with a Semileptonic Tagging Method. PHYSICAL REVIEW LETTERS 2020; 124:161803. [PMID: 32383937 DOI: 10.1103/physrevlett.124.161803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 03/10/2020] [Indexed: 06/11/2023]
Abstract
The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/B(B[over ¯]→Dℓ^{-}ν[over ¯]_{ℓ}) and R(D^{*})=B(B[over ¯]→D^{*}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]→D^{*}ℓ^{-}ν[over ¯]_{ℓ}), where ℓ denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D^{*}), based on a data sample containing 772×10^{6} BB[over ¯] events recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e^{+}e^{-} collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side τ is reconstructed in a purely leptonic decay. The measured values are R(D)=0.307±0.037±0.016 and R(D^{*})=0.283±0.018±0.014, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the standard model predictions within 0.2, 1.1, and 0.8 standard deviations for R(D), R(D^{*}), and their combination, respectively. This work constitutes the most precise measurements of R(D) and R(D^{*}) performed to date as well as the first result for R(D) based on a semileptonic tagging method.
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Adachi I, Ahlburg P, Aihara H, Akopov N, Aloisio A, Anh Ky N, Asner DM, Atmacan H, Aushev T, Aushev V, Aziz T, Babu V, Baehr S, Bambade P, Banerjee S, Bansal V, Barrett M, Baudot J, Becker J, Behera PK, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bianchi F, Biswas D, Bozek A, Bračko M, Branchini P, Briere RA, Browder TE, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Červenkov D, Chang MC, Cheaib R, Chekelian V, Chen YQ, Chen YT, Cheon BG, Chilikin K, Cho K, Cho S, Choi SK, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cunliffe S, Czank T, Dattola F, De La Cruz-Burelo E, De Nardo G, De Nuccio M, De Pietro G, de Sangro R, Destefanis M, Dey S, De Yta-Hernandez A, Di Capua F, Doležal Z, Domínguez Jiménez I, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Fast JE, Ferber T, Ferlewicz D, Finocchiaro G, Fiore S, Fodor A, Forti F, Fulsom BG, Ganiev E, Garcia-Hernandez M, Garg R, Gaur V, Gaz A, Gellrich A, Gemmler J, Geßler T, Giordano R, Giri A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Gradl W, Graziani E, Greenwald D, Guan Y, Hadjivasiliou C, Halder S, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hearty C, Hedges MT, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill EC, Hoek M, Hsu CL, Hu Y, Iijima T, Inami K, Inguglia G, Irakkathil Jabbar J, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaffe DE, Jang EJ, Jeon HB, Jia S, Jin Y, Joo C, Joo KK, Kahn J, Kakuno H, Kaliyar AB, Kandra J, Karyan G, Kato Y, Kawasaki T, Kim BH, Kim CH, Kim DY, Kim KH, Kim SH, Kim YK, Kim Y, Kimmel TD, Kindo H, Kleinwort C, Kodyš P, Koga T, Kohani S, Komarov I, Korpar S, Kovalchuk N, Kraetzschmar TMG, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kurz S, Kuzmin A, Kwon YJ, Lacaprara S, La Licata C, Lanceri L, Lange JS, Lautenbach K, Lee IS, Lee SC, Leitl P, Levit D, Li LK, Li YB, Libby J, Lieret K, Li Gioi L, Liptak Z, Liu QY, Liventsev D, Longo S, Luo T, Maeda Y, Maggiora M, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuda T, Matsuoka K, Matvienko D, Meggendorfer F, Mei JC, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Mizuk R, Azmi K, Mohanty GB, Moon T, Morii T, Moser HG, Mueller F, Müller FJ, Muller T, Muroyama G, Mussa R, Nakano E, Nakao M, Nayak M, Nazaryan G, Neverov D, Niebuhr C, Nisar NK, Nishida S, Nishimura K, Nishimura M, Oberhof B, Ogawa K, Onishchuk Y, Ono H, Onuki Y, Oskin P, Ozaki H, Pakhlov P, Pakhlova G, Paladino A, Panta A, Paoloni E, Park H, Paschen B, Passeri A, Pathak A, Paul S, Pedlar TK, Peruzzi I, Peschke R, Pestotnik R, Piccolo M, Piilonen LE, Popov V, Praz C, Prencipe E, Prim MT, Purohit MV, Rados P, Rasheed R, Reiter S, Remnev M, Resmi PK, Ripp-Baudot I, Ritter M, Rizzo G, Rizzuto LB, Robertson SH, Rodríguez Pérez D, Roney JM, Rosenfeld C, Rostomyan A, Rout N, Russo G, Sahoo D, Sakai Y, Sandilya S, Sangal A, Santelj L, Sartori P, Sato Y, Savinov V, Scavino B, Schueler J, Schwanda C, Seddon RM, Seino Y, Selce A, Senyo K, Sfienti C, Shen CP, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sobie RJ, Soffer A, Sokolov A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Sumihama M, Sumiyoshi T, Summers DJ, Suzuki SY, Tabata M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Taniguchi N, Taras P, Tenchini F, Torassa E, Trabelsi K, Tsuboyama T, Uchida M, Unger K, Unno Y, Uno S, Ushiroda Y, Vahsen SE, van Tonder R, Varner GS, Varvell KE, Vinokurova A, Vitale L, Vossen A, Wakai M, Wakeling HM, Wan Abdullah W, Wang CH, Wang MZ, Warburton A, Watanabe M, Webb J, Wehle S, Wessel C, Wiechczynski J, Windel H, Won E, Yabsley B, Yamada S, Yan W, Yang SB, Ye H, Yin JH, Yonenaga M, Yuan CZ, Yusa Y, Zani L, Zhang Z, Zhilich V, Zhou QD, Zhou XY, Zhukova VI. Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States. PHYSICAL REVIEW LETTERS 2020; 124:141801. [PMID: 32338980 DOI: 10.1103/physrevlett.124.141801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 02/24/2020] [Indexed: 06/11/2023]
Abstract
Theories beyond the standard model often predict the existence of an additional neutral boson, the Z^{'}. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z^{'} in the process e^{+}e^{-}→μ^{+}μ^{-}Z^{'} and of a lepton-flavor-violating Z^{'} in e^{+}e^{-}→e^{±}μ^{∓}Z^{'}. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an L_{μ}-L_{τ} theory, into upper limits on the Z^{'} coupling constant at the level of 5×10^{-2}-1 for M_{Z^{'}}≤6 GeV/c^{2}.
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Garg R, Yang C, Fredenburg K, Kresak J, Dziegielewski P, Dourado J, Amdur R, Mendenhall W, Hitchcock K, Kaye F, Mitchell D, Sayour E, Silver N. Inflammatory and genetic signatures for recurrent oropharynx cancer. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2019.11.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Katrenko P, Adachi I, Aihara H, Al Said S, Asner DM, Aushev T, Badhrees I, Bahinipati S, Behera P, Beleño C, Bennett J, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bonvicini G, Bračko M, Campajola M, Cao L, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Capua F, Di Carlo S, Doležal Z, Dong TV, Eidelman S, Epifanov D, Fast JE, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Golob B, Grzymkowska O, Hartbrich O, Hayasaka K, Hayashii H, Hou WS, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Karyan G, Kichimi H, Kim DY, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Križan P, Kroeger R, Kuhr T, Lee IS, Lee SC, Lewis P, Li YB, Li Gioi L, Libby J, Lieret K, MacQueen C, Masuda M, Matsuda T, Matvienko D, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moon TJ, Mori T, Mussa R, Nakano E, Nakano T, Nakao M, Nayak M, Nisar NK, Nishida S, Nishimura K, Ono H, Onuki Y, Oskin P, Pakhlov P, Pakhlova G, Pang T, Pardi S, Park CW, Park H, Park SH, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Popov V, Prencipe E, Prim MT, Ritter M, Rostomyan A, Rout N, Russo G, Sahoo D, Sakai Y, Sandilya S, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shen CP, Shiu JG, Solovieva E, Starič M, Stottler ZS, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Tonder R, Varner G, Vossen A, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Won E, Yang SB, Ye H, Yelton J, Yin JH, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhukova V. Observation of the Radiative Decays of ϒ(1S) to χ_{c1}. PHYSICAL REVIEW LETTERS 2020; 124:122001. [PMID: 32281835 DOI: 10.1103/physrevlett.124.122001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/28/2020] [Accepted: 03/05/2020] [Indexed: 06/11/2023]
Abstract
We report the first observation of the radiative decay of the ϒ(1S) into a charmonium state. The significance of the observed signal of ϒ(1S)→γχ_{c1} is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[ϒ(1S)→γχ_{c1}]=[4.7_{-1.8}^{+2.4}(stat)_{-0.5}^{+0.4}(sys)×10^{-5}]. We also searched for ϒ(1S) radiative decays into χ_{c0,2} and η_{c}(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider at a center-of-mass energy equal to the ϒ(2S) mass using ϒ(1S) tagging by the ϒ(2S)→ϒ(1S)π^{+}π^{-} transitions.
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Kashi PK, Zeligs K, Vaz J, Garg R. 31: Robotic-assisted resection of a 10 cm retroperitoneal pelvic ganglioneuroma. Am J Obstet Gynecol 2020. [DOI: 10.1016/j.ajog.2019.12.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Barbagallo M, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté- Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Measurement of the energy-differential cross-section of the 12C(n,p) 12B and 12C(n,d) 11B reactions at the n_TOF facility at CERN. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023901045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Although the 12C(n,p)12B and 12C(n,d)11B reactions are of interest in several fields of basic and applied Nuclear Physics the present knowledge of these two cross-sections is far from being accurate and reliable, with both evaluations and data showing sizable discrepancies. As part of the challenging n_TOF program on (n,cp) nuclear reactions study, the energy differential cross-sections of the 12C(n,p)12B and 12C(n,d)11 B reactions have been measured at CERN from the reaction thresholds up to 30 MeV neutron energy. Both measurements have been recently performed at the long flight-path (185 m) experimental area of the n_TOF facility at CERN using a pure (99.95%) rigid graphite target and two silicon telescopes. In this paper an overview of the experiment is presented together with a few preliminary results.
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Chiaveri E, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown A, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Colonna N, Cortés G, Cortés-Giraldo M, Cosentino L, Cristallo S, Damone L, Davies P, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins D, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Michalopoulou V, Milazzo P, Millán-Callado M, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada J, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith A, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain J, Tarifeño-Saldivia A, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods P, Wright T, Žugec P. Status and perspectives of the neutron time-of-flight facility n_TOF at CERN. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023917001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia [1], the neutron time of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for wide-energy spectrum neutron cross section measurements. Thanks to the combination of excellent neutron energy resolution and high instantaneous neutron flux available in the two experimental areas, the second of which has been constructed in 2014, n_TOF is providing a wealth of new data on neutron-induced reactions of interest for nuclear astrophysics, advanced nuclear technologies and medical applications. The unique features of the facility will continue to be exploited in the future, to perform challenging new measurements addressing the still open issues and long-standing quests in the field of neutron physics. In this document the main characteristics of the n_TOF facility and their relevance for neutron studies in the different areas of research will be outlined, addressing the possible future contribution of n_TOF in the fields of nuclear astrophysics, nuclear technologies and medical applications. In addition, the future perspectives of the facility will be described including the upgrade of the spallation target, the setup of an imaging installation and the construction of a new irradiation area.
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Oprea A, Gunsing F, Schillebeeckx P, Aberle O, Bacak M, Berthoumieux E, Cano-Ott D, Diakaki M, Dupont E, Geslot B, Glodariu T, Heyse J, Mendoza E, Negret A, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Bécares V, Babiano-Suarez V, Barbagallo M, Becčvář F, Bellia G, Billowes J, Bosnar D, Brown A, Busso M, Caamaño M, Caballero-Ontanaya L, Calviño F, Calviani M, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Dietz M, Domingo-Pardo C, Dressler R, Durán I, Eleme Z, Femández-Domínguez B, Ferrari A, Finocchiaro P, Furman V, Göbel K, Garg R, Gawlik A, Gilardoni S, Goncalves IF, González-Romero E, Guerrero C, Harada H, Heinitz S, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kimura A, Kivel N, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Nolte R, Ogállar F, Patronis N, Pavlik A, Perkowski J, Persanti L, Porras I, Praena J, Quesada JM, Radeck D, Ramos-Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schumann D, Smith AG, Sosnin NV, Stamatopoulos A, Tagliente G, Tain JL, Talip T, Tarifeño-Saldivia A, Tassan-Got L, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright T, Žugec P. Neutron capture cross section measurements of 241Am at the n_TOF facility. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023901009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Neutron capture on 241Am plays an important role in the nuclear energy production and also provides valuable information for the improvement of nuclear models and the statistical interpretation of the nuclear properties. A new experiment to measure the 241Am(n, γ) cross section in the thermal region and the first few resonances below 10 eV has been carried out at EAR2 of the n_TOF facility at CERN. Three neutron-insensitive C6D6 detectors have been used to measure the neutron-capture gamma cascade as a function of the neutron time of flight, and then deduce the neutron capture yield. Preliminary results will be presented and compared with previously obtained results at the same facility in EAR1. In EAR1 the gamma-ray background at thermal energies was about 90% of the signal while in EAR2 is up to a 25 factor much more favorable signal to noise ratio. We also extended the low energy limit down to subthermal energies. This measurement will allow a comparison with neutron capture measurements conducted at reactors and using a different experimental technique.
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Mendoza E, Alcayne V, Cano-Ott D, Kimura A, Skarbeli AV, Aberle O, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bécares V, Bečvář F, Bellia G, Berthoumieux E, Billowes J, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Glodariu T, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Kadi Y, Käppeler F, Kivel N, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Matteucci F, Maugeri E, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Piersanti L, Porras I, Praena J, Quesada JM, Radeck D, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Smith AG, Sosnin N, Stamatopoulos A, Tagliente G, Tain JL, Talip Z, Tarifeño-Saldivia AE, Tassan-Got L, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Study of photon strength functions of 241Pu and 245Cm from neutron capture measurements. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023901015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have measured theγ-rays following neutron capture on240Pu and244Cm at the n_TOF facility at CERN with the Total Absorption Calorimeter (TAC) and with C6D6 organic scintillators. The TAC is made of 40 BaF2 crystals operating in coincidence and covering almost the entire solid angle. This allows to obtain information concerning the energy spectra and the multiplicity of the measured captureγ-ray cascades. Additional information is also obtained from the C6D6 detectors. We have analyzed the measured data in order to draw conclusions about the Photon Strength Functions (PSFs) of241Pu and245Cm below their neutron separation energies. The analysis has been performed by fitting the PSFs to the experimental results, using the differential evolution method, in order to find neutron capture cascades capable of reproducing at the same time a great variety of deposited energy spectra.
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Michalopoulou V, Stamatopoulos A, Vlastou R, Kokkoris M, Tsinganis A, Diakaki M, Eleme Z, Patronis N, Heyse J, Schillebeeckx P, Tassan-Got L, Barbagallo M, Colonna N, Urlass S, Macina D, Chiaveri E, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Femández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kopatch Y, Krtiička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Thomas B, Torres-Sánchez P, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Wallner A, Woods PJ, Wright TJ, Žugec P. First results of the 230Th(n,f) cross section measurements at the CERN n_TOF facility. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023905004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The study of neutron-induced reactions on actinides is of considerable importance for the design of advanced nuclear systems and alternative fuel cycles. Specifically, 230Th is produced from the α-decay of 234U as a byproduct of the 232Th/233U fuel cycle, thus the accurate knowledge of its fission cross section is strongly required. However, few experimental datasets exist in literature with large deviations among them, covering the energy range between 0.2 to 25 MeV. In addition, the study of the 230Th(n,f) cross-section is of great interest in the research on the fission process related to the structure of the fission barriers. Previous measurements have revealed a large resonance at En=715 keV and additional fine structures, but with high discrepancies among the cross-section values of these measurements. This contribution presents preliminary results of the 230Th(n,f) cross-section measurements at the CERN n_TOF facility. The high purity targets of the natural, but very rare isotope 230Th, were produced at JRC-Geel in Belgium. The measurements were performed at both experimental areas (EAR-1 and EAR-2) of the n_TOF facility, covering a very broad energy range from thermal up to at least 100 MeV. The experimental setup was based on Micromegas detectors with the 235U(n,f) and 238U(n,f) reaction cross-sections used as reference.
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Mengoni A, Damone L, Barbagallo M, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown A, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo M, Cosentino L, Cristallo S, Davies P, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins D, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu P, Mastromarco M, Maugeri E, Mazzone A, Mendoza E, Michalopoulou V, Milazzo P, Millán-Callado M, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada J, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith A, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain J, Tarifeño-Saldivia A, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods P, Wright T, Žugec P. New reaction rates for the destruction of 7Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023907001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
New measurements of the7Be(n,α)4He and7Be(n,p)7Li reaction cross sections from thermal to keV neutron energies have been recently performed at CERN/n_TOF. Based on the new experimental results, astrophysical reaction rates have been derived for both reactions, including a proper evaluation of their uncertainties in the thermal energy range of interest for big bang nucleosynthesis studies. The new estimate of the7Be destruction rate, based on these new results, yields a decrease of the predicted cosmological7Li abundance insufficient to provide a viable solution to the cosmological lithium problem.
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Mastromarco M, Mazzone A, Massimi C, Cristallo S, Colonna N, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Chiaveri E, Cortés GP, Cortés-Giraldo MA, Cosentino L, Damone LA, Davies PJ, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Mastinu PF, Maugeri E, Mendoza E, Mengoni A, Michalopoulou V, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Doval DR, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Tassan-Got L, Thomas B, Torres-Sánchez P, Tsinganis A, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. The 154Gd neutron capture cross section measured at the n_TOF facility and its astrophysical implications. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023907003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The (n, γ) cross sections of the gadolinium isotopes play an important role in the study of the stellar nucleosynthesis. In particular, among the isotopes heavier than Fe, 154Gd together with 152Gd have the peculiarity to be mainly produced by the slow capture process, the so-called s-process, since they are shielded against the β-decay chains from the r-process region by their stable samarium isobars. Such a quasi pure s-process origin makes them crucial for testing the robustness of stellar models in galactic chemical evolution (GCE). According to recent models, the 154Gd and 152Gd abundances are expected to be 15-20% lower than the reference un-branched s-process 150Sm isotope. The close correlation between stellar abundances and neutron capture cross sections prompted for an accurate measurement of 154Gd cross section in order to reduce the uncertainty attributable to nuclear physics input and eventually rule out one of the possible causes of present discrepancies between observation and model predictions. To this end, the neutron capture cross section of 154Gd was measured in a wide neutron energy range (from thermal up to some keV) with high resolution in the first experimental area of the neutron time-of-flight facility n_TOF (EAR1) at CERN. In this contribution, after a brief description of the motivation and of the experimental setup used in the measurement, the preliminary results of the 154Gd neutron capture reaction as well as their astrophysical implications are presented.
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Alcayne V, Mendoza E, Cano-Ott D, Kimura A, Aberle O, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Barbagallo M, Bécares V, Bečvář F, Bellia G, Berthoumieux E, Billowes J, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Casanovas A, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Diakaki M, Dietz M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Eleme Z, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Glodariu T, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Heyse J, Jenkins DG, Jericha E, Kadi Y, Käppeler F, Kivel N, Kokkoris M, Kopatch Y, Krtička M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lo Meo S, Lonsdale SJ, Macina D, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Mastromarco M, Matteucci F, Maugeri E, Mazzone A, Mengoni A, Michalopoulou V, Milazzo PM, Mingrone F, Musumarra A, Negret A, Nolte R, Ogállar F, Oprea A, Patronis N, Pavlik A, Perkowski J, Piersanti L, Porras I, Praena J, Quesada JM, Radeck D, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Smith AG, Sosnin N, Stamatopoulos A, Tagliente G, Tain JL, Talip Z, Tarifeño-Saldivia AE, Tassan-Got L, Torres-Sánchez P, Tsinganis A, Ulrich J, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Woods PJ, Wright TJ, Žugec P. Measurement of the 244Cm capture cross sections at both CERN n_TOF experimental areas. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023901034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Accurate neutron capture cross section data for minor actinides (MAs) are required to estimate the production and transmutation rates of MAs in light water reactors with a high burnup, critical fast reactors like Gen-IV systems and other innovative reactor systems such as accelerator driven systems (ADS). Capture reactions of244Cm open the path for the formation of heavier Cm isotopes and of heavier elements such as Bk and Cf. In addition,244Cm shares nearly 50% of the total actinide decay heat in irradiated reactor fuels with a high burnup, even after three years of cooling.Experimental data for this isotope are very scarce due to the difficulties of providing isotopically enriched samples and because the high intrinsic activity of the samples requires the use of neutron facilities with high instantaneous flux. The only two previous experimental data sets for this neutron capture cross section have been obtained in 1969 using a nuclear explosion and, more recently, at J-PARC in 2010. The neutron capture cross sections have been measured at n_TOF with the same samples that the previous experiments in J-PARC. The samples were measured at n_TOF Experimental Area 2 (EAR-2) with three C6D6detectors and also in Experimental Area 1 (EAR-1) with the Total Absorption Calorimeter (TAC). Preliminary results assessing the quality and limitations of these new experimental datasets are presented for the experiments in both areas. Preliminary yields of both measurements will be compared with evaluated libraries for the first time.
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Eleme Z, Patronis N, Stamatopoulos A, Tsinganis A, Kokkoris M, Michalopoulou V, Diakaki M, Vlastou R, Tassan-Got L, Colonna N, Heyse J, Barbagallo M, Mastromarco M, Macina D, Chiaveri E, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Bennett S, Berthoumieux E, Bosnar D, Brown AS, Busso M, Caamaño M, Caballero L, Calviani M, Calviño F, Cano-Ott D, Casanovas A, Cerutti F, Cortés GP, Cortés-Giraldo MA, Cosentino L, Cristallo S, Damone LA, Davies PJ, Dietz M, Domingo-Pardo C, Dressler R, Ducasse Q, Dupont E, Durán I, Fernández-Domíngez B, Ferrari A, Ferro-Gonçalves I, Finocchiaro P, Furman V, Garg R, Gawlik A, Gilardoni S, Göbel K, González-Romero E, Guerrero C, Gunsing F, Heinitz S, Jenkins DG, Jericha E, Jiri U, Junghans A, Kadi Y, Käppeler F, Kimura A, Knapová I, Kopatch Y, Krticˇka M, Kurtulgil D, Ladarescu I, Lederer-Woods C, Lerendegui-Marco J, Lonsdale SJ, Manna A, Martínez T, Masi A, Massimi C, Mastinu PF, Maugeri E, Mazzone A, Mendoza E, Mengoni A, Milazzo PM, Millán-Callado MA, Mingrone F, Moreno-Soto J, Musumarra A, Negret A, Ogállar F, Oprea A, Pavlik A, Perkowski J, Petrone C, Piersanti L, Pirovano E, Porras I, Praena J, Quesada JM, Ramos Doval D, Reifarth R, Rochman D, Rubbia C, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schumann D, Sekhar A, Smith AG, Sosnin N, Sprung P, Tagliente G, Tain JL, Tarifeño-Saldivia AE, Thomas B, Torres-Sánchez P, Urlass S, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vescovi D, Vlachoudis V, Wallner A, Woods PJ, Wright TJ, Žugec P. First results of the 241Am(n,f) cross section measurement at the Experimental Area 2 of the n_TOF facility at CERN. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202023905014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Feasibility, design and sensitivity studies on innovative nuclear reactors that could address the issue of nuclear waste transmutation using fuels enriched in minor actinides, require high accuracy cross section data for a variety of neutron-induced reactions from thermal energies to several tens of MeV. The isotope 241Am (T1/2= 433 years) is present in high-level nuclear waste (HLW), representing about 1.8 % of the actinide mass in spent PWR UOx fuel. Its importance increases with cooling time due to additional production from the β-decay of 241Pu with a half-life of 14.3 years. The production rate of 241 Am in conventional reactors, including its further accumulation through the decay of 241Pu and its destruction through transmutation/incineration are very important parameters for the design of any recycling solution. In the present work, the 241 Am(n,f) reaction cross-section was measured using Micromegas detectors at the Experimental Area 2 of the n_TOF facility at CERN. For the measurement, the 235U(n,f) and 238U(n,f) reference reactions were used for the determination of the neutron flux. In the present work an overview of the experimental setup and the adopted data analysis techniques is given along with preliminary results.
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Garg R, Baral P, Jain L, Kurmi AK, Agrawal D. Monitoring steady production of 1,3-propanediol during bioprospecting of glycerol-assimilating soil microbiome using dye-based pH-stat method. J Appl Microbiol 2019; 128:491-499. [PMID: 31642142 DOI: 10.1111/jam.14496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 10/01/2019] [Accepted: 10/17/2019] [Indexed: 11/29/2022]
Abstract
AIM In this investigation, a dye-based pH-stat method was devised for monitoring steady production of 1,3-propanediol (1,3-PDO) during bioprospecting of glycerol-assimilating soil microbiome. METHODS AND RESULTS Soil samples were collected from two potential sites of CSIR-IIP, India. Selective enrichment of microbial consortia was done using the glycerol-based medium at initial stage, followed by purification to isolated colonies, after positive high-performance liquid chromatography detection of 1,3-PDO in the fermentation broth. When the purified isolated were re-tested for 1,3-PDO production, only two isolates namely Isolate 1 and Isolate 3 were capable of producing the targeted product preferably under anaerobic conditions. Based on better 1,3-PDO fermentation efficiency (Isolate 3, 22% vs Isolate 1, 4·48%) and acetic acid as the only major by-product, Isolate 3 was shortlisted for further studies. A dye-based technique was devised in which bromothymol blue was incorporated into the medium to monitor the pH drop due to acetic acid formation and hence change in colour. Visual change in colour helped in intermittent pH restoration. During fermentation, with pH stat being 8-8·5, Isolate 3 at 32°C yielded 0·67 mol mol-1 1,3-PDO within a short span of 12 h only with an initial concentration of glycerol being 20 g l-1 . Phylogenetic analysis revealed that Isolate 3 shared 95·8% homology with Citrobacter freundii CFNIH1 and hence designated as C. freundii IIP DR3. CONCLUSION This study demonstrated that during bioprospecting glycerol-assimilating microbiome, dye-based technique can be successfully employed. This technique can further be exploited to monitor consistent production of all microbial secondary metabolites that accompanies acid production. SIGNIFICANCE AND IMPACT OF THE STUDY Incorporation of 'Bromothymol blue' can visually help in the identification of pH drop in the medium, so that pH stat can be easily maintained during 1,3-PDO production from glycerol especially under shake flask conditions.
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Jin Y, Aihara H, Epifanov D, Adachi I, Al Said S, Asner D, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bansal V, Behera P, Berger M, Bhardwaj V, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bračko M, Campajola M, Cao L, Červenkov D, Chekelian V, Chen A, Cheon B, Chilikin K, Cho H, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Doležal Z, Dong T, Dossett D, Eidelman S, Fast J, Ferber T, Fulsom B, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Golob B, Greenwald D, Grzymkowska O, Haba J, Hayasaka K, Hayashii H, Hedges M, Hou WS, Huang K, Iijima T, Inami K, Inguglia G, Ishikawa A, Iwasaki M, Iwasaki Y, Jacobs W, Jeon H, Jia S, Joffe D, Joo K, Kahn J, Kaliyar A, Karyan G, Kawasaki T, Kichimi H, Kiesling C, Kim D, Kim H, Kim K, Kim S, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kulasiri R, Kumar R, Kuzmin A, Kwon YJ, Lalwani K, Lange J, Lee J, Lee S, Li C, Li L, Li Y, Li Gioi L, Libby J, Lieret K, Liptak Z, Liventsev D, Lu PC, Luo T, MacNaughton J, Masuda M, Matsuda T, Matvienko D, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mori T, Mussa R, Nakano E, Nakao M, Nath K, Natkaniec Z, Nayak M, Niiyama M, Nisar N, Nishida S, Ogawa S, Ono H, Onuki Y, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park H, Park SH, Patra S, Paul S, Pedlar T, Pestotnik R, Piilonen L, Popov V, Prencipe E, Purohit M, Rostomyan A, Russo G, Sahoo D, Sakai Y, Salehi M, Sandilya S, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Seon O, Sevior M, Shebalin V, Shen C, Shiu JG, Shwartz B, Simon F, Singh J, Sokolov A, Solovieva E, Stanič S, Starič M, Stottler Z, Strube J, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Tonder R, Varner G, Vinokurova A, Vorobyev V, Vossen A, Wang B, Wang C, Wang MZ, Wang P, Watanuki S, Won E, Yang S, Ye H, Yin J, Yuan C, Yusa Y, Zhang Z, Zhilich V, Zhukova V. Observation of
τ−→π−ντe+e−
and search for
τ−→π−ντμ+μ−. Int J Clin Exp Med 2019. [DOI: 10.1103/physrevd.100.071101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Garg R. Imaging of other encephalitis and of noncompressive acute transverse myelopathies. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Garg R, Rech MA, Schneck M. Stroke Mimics: An Important Source of Bias in Acute Ischemic Stroke Research. J Stroke Cerebrovasc Dis 2019; 28:2475-2480. [DOI: 10.1016/j.jstrokecerebrovasdis.2019.06.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/05/2019] [Accepted: 06/15/2019] [Indexed: 01/22/2023] Open
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Mohan BP, Krishnamoorthi R, Ponnada S, Shakhatreh M, Jayaraj M, Garg R, Law J, Larsen M, Irani S, Ross A, Adler DG. Liquid Nitrogen Spray Cryotherapy in Treatment of Barrett's Esophagus, where do we stand? A Systematic Review and Meta-Analysis. Dis Esophagus 2019; 32:5304729. [PMID: 30715267 DOI: 10.1093/dote/doy130] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 12/06/2018] [Indexed: 12/11/2022]
Abstract
Radiofrequency ablation (RFA) is the preferred treatment option for Barrett's esophagus (BE) to achieve complete eradication (CE) of dysplasia (D), and intestinal metaplasia (IM). Cryotherapy, using liquid nitrogen (LNC), is a cold-induced tissue-injury technique option for the ablation of BE. We conducted a systematic review and meta-analysis to assess the overall efficacy and safety of LNC in the treatment of BE. We conducted a search of multiple electronic databases and conference proceedings from inception through June 2018. The primary outcome was to estimate the pooled rates of CE-IM, CE-D, and CE-HGD. The secondary outcome was to estimate the risk of adverse events and recurrence of disease after LNC. Nine studies reported 386 patients who were treated with LNC. The pooled rate of CE-IM was 56.5% (95% CI 48.5-64.2, I2 = 47), pooled rate of CE-D was 83.5% (95% CI 78.3-87.7, I2 = 22.8), and pooled rate of CE-HGD was 86.5% (95% CI 64.4-95.8, I2 = 88.1). Rate of adverse events was 4.7%, and the risk of BE recurrence was 12.7%. On subgroup analysis, the pooled rate of CE-IM with LNC in patients who failed RFA was 58.4% (95% CI 47.2-68.8, I2 = 32.5), and the pooled rate of CE-D in the same population was 81.9% (95% CI 72.5-88.6, I2 = 5.9). CE-D rates with LNC are comparable to RFA while CE-IM rates appear to be lower than the rates achievable with RFA. CE-IM rate in RFA failed patients is 58.4% and thus LNC is a rescue option to consider in this population.
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Pal B, Adachi I, Adamczyk K, Aihara H, Asner D, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bansal V, Behera P, Beleño C, Berger M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bozek A, Bračko M, Browder T, Campajola M, Cao L, Červenkov D, Chekelian V, Chen A, Cheon B, Chilikin K, Cho K, Choi SK, Choi Y, Cinabro D, Cunliffe S, Di Carlo S, Doležal Z, Dong T, Dossett D, Eidelman S, Epifanov D, Fast J, Ferber T, Fulsom B, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Guan Y, Haba J, Hara T, Hayasaka K, Hayashii H, Hou WS, Hsu CL, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs W, Jia S, Jin Y, Joffe D, Joo K, Kaliyar A, Karyan G, Kichimi H, Kiesling C, Kim C, Kim D, Kim K, Kim S, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kulasiri R, Kwon YJ, Lee J, Lee S, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lu PC, Luo T, MacNaughton J, MacQueen C, Masuda M, Matsuda T, Matvienko D, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty G, Nakao M, Nath K, Nayak M, Nisar N, Nishida S, Nishimura K, Ogawa S, Ono H, Onuki Y, Pakhlov P, Pakhlova G, Pardi S, Park SH, Patra S, Paul S, Pedlar T, Pestotnik R, Piilonen L, Popov V, Prencipe E, Rostomyan A, Russo G, Sakai Y, Salehi M, Sandilya S, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Schwartz A, Seino Y, Senyo K, Sevior M, Shen C, Shiu JG, Simon F, Sokolov A, Solovieva E, Starič M, Stottler Z, Strube J, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Uchida M, Uglov T, Uno S, Urquijo P, Van Tonder R, Varner G, Vinokurova A, Wang B, Wang C, Wang MZ, Wang P, Watanabe M, Watanuki S, Won E, Yang S, Ye H, Yelton J, Yusa Y, Zhang J, Zhang Z, Zhilich V, Zhukova V. Evidence for the decay
B0→pp¯π0. Int J Clin Exp Med 2019. [DOI: 10.1103/physrevd.99.091104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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