Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer - INSPIRE

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Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer

AMS

Collaboration

•

M. Aguilar
(
- Madrid, CIEMAT
)

Feb 25, 2021

8 pages

Published in:

Phys.Rev.Lett. 126 (2021) 8, 081102

Published: Feb 25, 2021

DOI:

10.1103/PhysRevLett.126.081102

Experiments:

AMS

View in:

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Abstract: (APS)

Precise knowledge of the charge and rigidity dependence of the secondary cosmic ray fluxes and the secondary-to-primary flux ratios is essential in the understanding of cosmic ray propagation. We report the properties of heavy secondary cosmic ray fluorine F in the rigidity

R

range 2.15 GV to 2.9 TV based on 0.29 million events collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The fluorine spectrum deviates from a single power law above 200 GV. The heavier secondary-to-primary F/Si flux ratio rigidity dependence is distinctly different from the lighter B/O (or B/C) rigidity dependence. In particular, above 10 GV, the

^{\textrm{F/Si}}_{\textrm{B/O}}

ratio can be described by a power law

R^δ

with

δ=0.052±0.007

. This shows that the propagation properties of heavy cosmic rays, from F to Si, are different from those of light cosmic rays, from He to O, and that the secondary cosmic rays have two classes.

Gravitation and Astrophysics
cosmic radiation: secondary
flux: ratio
cosmic radiation: propagation
fluorine
magnetic spectrometer
AMS
satellite
helium
oxygen

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