Measurement of beryllium isotopic composition in cosmic rays with the AMS-02 experiment on the International Space Station

Cernetti, C. and Dimiccoli, F. and Nozzoli, F. and Zuccon, P. (2021) Measurement of beryllium isotopic composition in cosmic rays with the AMS-02 experiment on the International Space Station. Il nuovo cimento C, 44 (2-3). pp. 1-4. ISSN 1826-9885

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Abstract

Cosmic rays are a powerful tool for the investigation of the structure of the magnetic fields in the galactic halo and of the properties of the Inter-Stellar Medium. Two parameters of the cosmic rays propagation models, the galactic halo (half-) thickness, H, and the diffusion coefficient, D, are loosely constrained by current cosmic rays flux measurements, in particular a large degeneracy exists being only H/D well measured. The 10Be/9Be isotopic flux ratio (thanks to the 2 My lifetime of 10Be) can be used as a radioactive clock providing the measurement of cosmic rays residence time in the galaxy. This is an important probe to solve the H/D degeneracy. Past measurements of 10Be/9Be isotopic flux ratio in CR are scarce, limited to low energy and affected by large uncertainties. In this work, new preliminary measurements of 10Be/9Be and complementary 7Be/Be flux ratios are presented, both obtained from the data of the AMS-02 experiment.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	19 Jul 2021 10:07
Last Modified:	19 Jul 2021 10:07
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21309

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