Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

Article Article scientifique Article Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer eng 2024-06-25 2024 author Bourquin Maurice DPNC, Université de Genève, 1211 Genève 4, Switzerland. 25314 Administration de la faculté des sciences (SIAD) author Khan Shahid DPNC, Université de Genève, 1211 Genève 4, Switzerland. 411023 author Li Manbing DPNC, Université de Genève, 1211 Genève 4, Switzerland. 404387 Département de physique nucléaire et corpusculaire (FINUC) author Paniccia Mercedes 0000-0001-8482-2703 DPNC, Université de Genève, 1211 Genève 4, Switzerland. 561777 Département de physique nucléaire et corpusculaire (FINUC) author Rapin Divic Jean DPNC, Université de Genève, 1211 Genève 4, Switzerland. 24725 author Robyn Erwan 0009-0001-3489-0588 DPNC, Université de Genève, 1211 Genève 4, Switzerland. 942984 author Wei Jiahui DPNC, Université de Genève, 1211 Genève 4, Switzerland.,Shandong Institute of Advanced Technology (SDIAT), Jinan, Shandong 250100, China. 879098 AMS Collaboration 261001 10.1103/PhysRevLett.132.261001 38996294 0031-9007 https://link.aps.org/doi/10.1103/PhysRevLett.132.261001 Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of the deuteron (D) flux are presented. The measurements are based on 21×10^{6} D nuclei in the rigidity range from 1.9 to 21 GV collected from May 2011 to April 2021. We observe that over the entire rigidity range the D flux exhibits nearly identical time variations with the p, ^{3}He, and ^{4}He fluxes. Above 4.5 GV, the D/^{4}He flux ratio is time independent and its rigidity dependence is well described by a single power law ∝R^{Δ} with Δ_{D/^{4}He}=-0.108±0.005. This is in contrast with the ^{3}He/^{4}He flux ratio for which we find Δ_{^{3}He/^{4}He}=-0.289±0.003. Above ∼13 GV we find a nearly identical rigidity dependence of the D and p fluxes with a D/p flux ratio of 0.027±0.001. These unexpected observations indicate that cosmic deuterons have a sizable primarylike component. With a method independent of cosmic ray propagation, we obtain the primary component of the D flux equal to 9.4±0.5% of the ^{4}He flux and the secondary component of the D flux equal to 58±5% of the ^{3}He flux. Dewey 500.2 U.S. Department of Energy DE-AC02-05CH11231 National Energy Research Scientific Computing Center CERN Massachusetts Institute of Technology Chinese Academy of Sciences Institute of High Energy Physics China Academy of Space Technology National Natural Science Foundation of China 12275158 Ministry of Science and Technology of the People’s Republic of China National Key Research and Development Program of China 2022YFA1604802 China Scholarship Council Government of Shandong Province Government of Jiangsu Province Government of Guangdong Province Shandong University Academy of Finland 321882 Centre National de la Recherche Scientifique Institut National de Physique Nucléaire et de Physique des Particules Centre National d’Etudes Spatiales Deutsches Zentrum für Luft- und Raumfahrt 50OO1803 RWTH Aachen University Instituto Nazionale di Fisica Nucleare Agenzia Spaziale Italiana 2019-19-HH.0 Università degli Studi di Perugia Ministero dell’Università e della Ricerca Consejo Nacional de Ciencia y Tecnología CF-2019/2042 Nederlandse Organisatie voor Wetenschappelijk Onderzoek 680-1-004 Fundação para a Ciência e a Tecnologia CERN/FIS-PAR/0013/2019 Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas Instituto de Astrofísica de Canarias Centro para el Desarrollo Tecnológico Industrial Ministerio de Ciencia e Innovación Agencia Estatal de Investigación European Regional Development Fund PID2022-137810NB-C21/C22 Academia Sinica National Science and Technology Council Ministry of Science and Technology, Taiwan 111-2123-M-001-004 National Cheng Kung University Türkiye Enerji, Nükleer ve Maden Ara?t?rma Kurumu 2020TAEK(CERN)A5.H1.F5-26 National Aeronautics and Space Administration 80NSSC20K1819 Johnson Space Center Marshall Space Flight Center Universidad Nacional Autónoma de México Institute of Electrical Engineering Shandong Institute of Advanced Technology, China ANSWERS Fondation Dr. Manfred Steuer National Science Foundation Cosmic-ray Antinuclei as Messengers of New Physics 2013228 US Directorate for Mathematical & Physical Sciences 34 Département de physique nucléaire et corpusculaire 132 false 792 Groupe Wu https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.132.261001/SM-D-Tables-REV.pdf Physical review letters 132 26 a06ca484-7894-44ed-aa49-3b56406e11bd Article (Published version) Restricted Article_scientifique_from_crossref.pdf 478453 application/pdf 58abebf082275eb80345a7e939a8538b8d2a0dfea56f06df630bd6ddbf8afaad restrictedAccess Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

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Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer	Physical review letters			2024	37	0

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Khan, Shahid