28 July 2020 to 6 August 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

30 Jul 2020, 12:05
25m
virtual conference

virtual conference

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

Speaker

Jiahui Wei (Universite de Geneve (CH))

Description

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