July 28, 2020 to August 6, 2020
virtual conference
Europe/Prague timezone

Measurements of Light Nuclear Isotopic Composition in Cosmic Rays with the Alpha Magnetic Spectrometer on the International Space Station

Jul 30, 2020, 12:05 PM
virtual conference

virtual conference

Talk 08. Astro-particle Physics and Cosmology Astro-particle Physics and Cosmology


Jiahui Wei (Universite de Geneve (CH))


The average lifetime of cosmic rays in the Galaxy related with their confinement within the Galactic propagation halo, is a very important parameter to understand comic-ray propagation processes and the cosmic-ray origin. The measurement of the 10Be/9Be secondary isotopes ratio, as 10Be has half-life of 1.39 million years, can be used to constrain the propagation lifetime. The 6Li/7Li ratio, as both isotopes are secondary and stable, is expected to reflect the ratio between the production cross sections and therefore constitute a good check of the reconstruction method. Measurement of the lithium and beryllium isotopes ratio (6Li/7Li) and (10Be/9Be) as a function of the kinetic energy per nucleon from 0.5 GeV/nucl to 10 GeV/nucl based on data collected by AMS during the first 7 years of operation are presented. Prospects for measurement of the boron isotopic ratios with AMS-02 will be presented.

Primary authors

Jiahui Wei (Universite de Geneve (CH)) Javier Berdugo Perez (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Laurent Yves Marie Derome (LPSC Laboratoire de Physique Subatomique et de Cosmologie (LPSC)) Mercedes Paniccia (Universite de Geneve (CH)) Fernando De Carvalho Barao (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)

Presentation materials