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

被引：0

作者：

Cernetti, C. ^{[1
]}

Dimiccoli, F. ^{[2
]}

Nozzoli, F. ^{[2
]}

Zuccon, P. ^{[1
]}

机构：

[1] Trento Univ, I-38123 Trento, Italy

[2] INFN, Trento Inst Fundamental Phys & Applicat, I-38123 Trento, Italy

来源：

NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS | 2021年 / 44卷 / 2-3期

关键词：

D O I：

10.1393/ncc/i2021-21088-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 Be-10/Be-9 isotopic flux ratio (thanks to the 2 My lifetime of Be-10) 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 Be-10/Be-9 isotopic flux ratio in CR are scarce, limited to low energy and affected by large uncertainties. In this work, new preliminary measurements of Be-10/Be-9 and complementary Be-7/Be flux ratios are presented, both obtained from the data of the AMS-02 experiment.

引用

页数：4

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