Europe PMC

This website requires cookies, and the limited processing of your personal data in order to function. By using the site you are agreeing to this as outlined in our privacy notice and cookie policy.

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 21×10^{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.

Citations & impact 


This article has not been cited yet.

Impact metrics

Alternative metrics

Altmetric item for https://www.altmetric.com/details/164841577
Altmetric
Discover the attention surrounding your research
https://www.altmetric.com/details/164841577

Similar Articles 


To arrive at the top five similar articles we use a word-weighted algorithm to compare words from the Title and Abstract of each citation.


Funding 


Funders who supported this work.

ANSWERS

    Academia Sinica

      Academy of Finland (1)

      Agencia Estatal de Investigación

        Agenzia Spaziale Italiana (1)

        CERN

          Centre National de la Recherche Scientifique

            Centre National d’Etudes Spatiales

              Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas

                Centro para el Desarrollo Tecnológico Industrial

                  China Academy of Space Technology

                    China Scholarship Council

                      Chinese Academy of Sciences

                        Consejo Nacional de Ciencia y Tecnología (1)

                        Deutsches Zentrum für Luft- und Raumfahrt (1)

                        Dutch Research Council (NWO) (1)

                        European Regional Development Fund (3)

                        Fondation Dr. Manfred Steuer

                          Fundação para a Ciência e a Tecnologia (1)

                          Government of Guangdong Province

                            Government of Jiangsu Province

                              Government of Shandong Province

                                Institut National de Physique Nucléaire et de Physique des Particules

                                  Institute of Electrical Engineering

                                    Institute of High Energy Physics

                                      Instituto Nazionale di Fisica Nucleare

                                        Instituto de Astrofísica de Canarias

                                          Johnson Space Center

                                            Marshall Space Flight Center

                                              Massachusetts Institute of Technology

                                                Ministerio de Ciencia e Innovación

                                                  Ministero dell’Università e della Ricerca

                                                    Ministry of Science and Technology of the People’s Republic of China

                                                      Ministry of Science and Technology, Taiwan (2)

                                                      National Aeronautics and Space Administration (2)

                                                      National Cheng Kung University

                                                        National Energy Research Scientific Computing Center

                                                          National Key Research and Development Program of China (2)

                                                          National Natural Science Foundation of China (1)

                                                          National Science Foundation (1)

                                                          National Science and Technology Council

                                                            RWTH Aachen University

                                                              Shandong Institute of Advanced Technology, China

                                                                Shandong University

                                                                  Türkiye Enerji, Nükleer ve Maden Ara?t?rma Kurumu (1)

                                                                  • Grant ID: 2020TAEK(CERN)A5.H1.F5-26

                                                                  U.S. Department of Energy (1)

                                                                  Universidad Nacional Autónoma de México

                                                                    Università degli Studi di Perugia