Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer
Name
PhysRevLett.126.081102.pdf
Description
Published version
Size
1.07 MB
Format
Unknown
Checksum (MD5)
d98a763e15ebd988e96160ca11534ffe
Author(s)
Aguilar, M.
Cavasonza, L. Ali
Allen, M. S.
Alpat, B.
Ambrosi, G.
Arruda, L.
Attig, N.
Barao, F.
Barrin, L.
Bartoloni, A.
Date Issued
February 2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
2021. "Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer." Physical Review Letters, 126 (8).
Version
Final published version
Abstract
© 2021 authors. Published by the American Physical Society. 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 F/SiB/O ratio can be described by a power law Rδ 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.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/physrevlett.126.081102
