PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - CRD - Cosmic Ray Direct
Cosmic-Ray Isotopes with the Alpha Magnetic Spectrometer
L. Derome
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The Alpha Magnetic Spectrometer (AMS-02) has been operating aboard the
International Space Station (ISS) since May 2011. Lithium and Beryllium are
expected to be mainly produced by the fragmentation of primary cosmic rays
(CR) during their propagation. Therefore, their measurement is essential in
the understanding of cosmic ray propagation and sources. Their isotopic
composition can provide crucial complementary information. In particular,
the $^{10}$Be/$^{9}$Be ratio can be used as a radioactive clock providing the
measurement of CR residence time in the Galaxy. In this contribution, the
measurement of the lithium isotopes $^{6}$Li and $^{7}$Li fluxes and ratios and $^{7}$Be,
$^{9}$Be, and $^{10}$Be fluxes and ratios based on data collected by AMS during the
first 8.5 years of operation are presented.
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