We report the observation of new properties of primary iron (Fe) cosmic rays in the rigidity range 2.65 GV to 3.0 TV with 0.62 million iron nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. Above 80.5 GV the rigidity dependence of the cosmic ray Fe flux is identical to the rigidity dependence of the primary cosmic ray He, C, and O fluxes, with the Fe/O flux ratio being constant at 0.155±0.006. This shows that unexpectedly Fe and He, C, and O belong to the same class of primary cosmic rays which is different from the primary cosmic rays Ne, Mg, and Si class.

Chen, Y., Paniccia, M., Aguilar, M., Ali Cavasonza, L., Allen, M., Alpat, B., et al. (2022). Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer. Intervento presentato a: 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin [10.22323/1.395.0129].

Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer

Consolandi C.;Gervasi M.;Grandi D.;La Vacca G.;Pensotti S.;Rozza D.;Tacconi M.;Zannoni M.;
2022

Abstract

We report the observation of new properties of primary iron (Fe) cosmic rays in the rigidity range 2.65 GV to 3.0 TV with 0.62 million iron nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. Above 80.5 GV the rigidity dependence of the cosmic ray Fe flux is identical to the rigidity dependence of the primary cosmic ray He, C, and O fluxes, with the Fe/O flux ratio being constant at 0.155±0.006. This shows that unexpectedly Fe and He, C, and O belong to the same class of primary cosmic rays which is different from the primary cosmic rays Ne, Mg, and Si class.
paper
Cosmic Rays
English
37th International Cosmic Ray Conference, ICRC 2021
2021
2022
395
129
https://pos.sissa.it/395/129/
open
Chen, Y., Paniccia, M., Aguilar, M., Ali Cavasonza, L., Allen, M., Alpat, B., et al. (2022). Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer. Intervento presentato a: 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin [10.22323/1.395.0129].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/471119
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