Cosmic Ray Light Nuclei Isotopes Measured by the Alpha Magnetic Spectrometer on the ISS

2 Sep 2021, 17:10
Talk in parallel session High Energy Astrophysics, Cosmic Rays and Multimessenger Astronomy Discussion Panel HE astrophys. & CRs/Multi-messenger astronomy 3


Jiahui Wei (Université de Genève)


Precise knowledge of the spectra of secondary cosmic-ray isotopes provides a powerful tool to constrain cosmic-ray propagation models. In particular, $^3$He isotopes in cosmic rays are produced by interactions of primary $^4$He with the interstellar medium; similarly, lithium and beryllium are mainly produced by the fragmentation of heavier primary cosmic-ray nuclei. Among light isotopes, the radioactive $^{10}$Be, which has half-life comparable to the cosmic-ray residence time in the Galaxy, provides crucial complementary information. We present precision measurements of the fluxes of helium isotopes, $^3$He and $^4$He, lithium isotopes, $^6$Li and $^7$Li, and beryllium isotopes, $^7$Be, $^9$Be and $^{10}$Be, as well as the time dependence of the $^3$He/$^4$He flux ratio, based on data collected by AMS on the International Space Station.

Primary authors

Carlos Delgado Mendez (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Fernando De Carvalho Barao (LIP - Laboratório de Instrumentação e Física Experimental de Partículas) Francesca Giovacchini (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Javier Berdugo Perez (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Jiahui Wei (Université de Genève) Laurent Yves Marie Derome (LPSC Laboratoire de Physique Subatomique et de Cosmologie (LPSC)) Mercedes Paniccia (Université de Genève)

Presentation Materials

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