Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

AMS Collaboration

doi:10.1103/PhysRevLett.132.261001

Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

AMS Collaboration

电气工程学院

CIEMAT
National Institute for Nuclear Physics
Massachusetts Institute of Technology
Laboratório de Instrumentação e Física Experimental de Partículas
Jülich Research Centre
CERN
University of Trento
University of Hawai'i at Mānoa
University of Perugia
NASA Johnson Space Center
University of Groningen
University of Rome La Sapienza
University of Geneva
National Research Council of Italy
Academia Sinica - Institute of Physics
CAS - Institute of High Energy Physics
University of Chinese Academy of Sciences
Shandong Institute of Advanced Technology
Zhejiang University
RWTH Aachen University
Université Grenoble Alpes
University of Bologna
Shandong University

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20 引用（Scopus）

摘要

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 21×106 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, He3, and He4 fluxes. Above 4.5 GV, the D/He4 flux ratio is time independent and its rigidity dependence is well described by a single power law ∝RΔ with ΔD/He4=-0.108±0.005. This is in contrast with the He3/He4 flux ratio for which we find ΔHe3/He4=-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 He4 flux and the secondary component of the D flux equal to 58±5% of the He3 flux.

源语言	英语
文章编号	261001
期刊	Physical Review Letters
卷	132
期	26
DOI	https://doi.org/10.1103/PhysRevLett.132.261001
出版状态	已出版 - 28 6月 2024

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@article{e16a0b0e750e4ab29f2c3345f6742b50,

title = "Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer",

abstract = "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 21×106 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, He3, and He4 fluxes. Above 4.5 GV, the D/He4 flux ratio is time independent and its rigidity dependence is well described by a single power law ∝RΔ with ΔD/He4=-0.108±0.005. This is in contrast with the He3/He4 flux ratio for which we find ΔHe3/He4=-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 He4 flux and the secondary component of the D flux equal to 58±5\% of the He3 flux.",

author = "\{AMS Collaboration\} and M. Aguilar and B. Alpat and G. Ambrosi and H. Anderson and L. Arruda and N. Attig and C. Bagwell and F. Barao and M. Barbanera and L. Barrin and A. Bartoloni and R. Battiston and A. Bayyari and N. Belyaev and B. Bertucci and V. Bindi and K. Bollweg and J. Bolster and M. Borchiellini and B. Borgia and Boschini, \{M. J.\} and M. Bourquin and C. Brugnoni and J. Burger and Burger, \{W. J.\} and Cai, \{X. D.\} and M. Capell and J. Casaus and G. Castellini and F. Cervelli and Chang, \{Y. H.\} and Chen, \{G. M.\} and Chen, \{G. R.\} and H. Chen and Chen, \{H. S.\} and Y. Chen and L. Cheng and Chou, \{H. Y.\} and S. Chouridou and V. Choutko and Chung, \{C. H.\} and C. Clark and G. Coignet and C. Consolandi and A. Contin and C. Corti and Z. Cui and K. Dadzie and F. D'Angelo and Wang, \{Q. L.\}",

note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by CERN.",

year = "2024",

month = jun,

day = "28",

doi = "10.1103/PhysRevLett.132.261001",

language = "英语",

volume = "132",

journal = "Physical Review Letters",

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T1 - Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

AU - AMS Collaboration

AU - Aguilar, M.

AU - Alpat, B.

AU - Ambrosi, G.

AU - Anderson, H.

AU - Arruda, L.

AU - Attig, N.

AU - Bagwell, C.

AU - Barao, F.

AU - Barbanera, M.

AU - Barrin, L.

AU - Bartoloni, A.

AU - Battiston, R.

AU - Bayyari, A.

AU - Belyaev, N.

AU - Bertucci, B.

AU - Bindi, V.

AU - Bollweg, K.

AU - Bolster, J.

AU - Borchiellini, M.

AU - Borgia, B.

AU - Boschini, M. J.

AU - Bourquin, M.

AU - Brugnoni, C.

AU - Burger, J.

AU - Burger, W. J.

AU - Cai, X. D.

AU - Capell, M.

AU - Casaus, J.

AU - Castellini, G.

AU - Cervelli, F.

AU - Chang, Y. H.

AU - Chen, G. M.

AU - Chen, G. R.

AU - Chen, H.

AU - Chen, H. S.

AU - Chen, Y.

AU - Cheng, L.

AU - Chou, H. Y.

AU - Chouridou, S.

AU - Choutko, V.

AU - Chung, C. H.

AU - Clark, C.

AU - Coignet, G.

AU - Consolandi, C.

AU - Contin, A.

AU - Corti, C.

AU - Cui, Z.

AU - Dadzie, K.

AU - D'Angelo, F.

AU - Wang, Q. L.

N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by CERN.

PY - 2024/6/28

Y1 - 2024/6/28

N2 - 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 21×106 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, He3, and He4 fluxes. Above 4.5 GV, the D/He4 flux ratio is time independent and its rigidity dependence is well described by a single power law ∝RΔ with ΔD/He4=-0.108±0.005. This is in contrast with the He3/He4 flux ratio for which we find ΔHe3/He4=-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 He4 flux and the secondary component of the D flux equal to 58±5% of the He3 flux.

AB - 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 21×106 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, He3, and He4 fluxes. Above 4.5 GV, the D/He4 flux ratio is time independent and its rigidity dependence is well described by a single power law ∝RΔ with ΔD/He4=-0.108±0.005. This is in contrast with the He3/He4 flux ratio for which we find ΔHe3/He4=-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 He4 flux and the secondary component of the D flux equal to 58±5% of the He3 flux.

UR - https://www.scopus.com/pages/publications/85196941883

U2 - 10.1103/PhysRevLett.132.261001

DO - 10.1103/PhysRevLett.132.261001

M3 - 文章

C2 - 38996294

AN - SCOPUS:85196941883

SN - 0031-9007

VL - 132

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 261001

ER -

Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

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