Observation of the Identical Rigidity Dependence of He, C, and O Cosmic Rays at High Rigidities by the Alpha Magnetic Spectrometer on the International Space Station


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Aguilar M., Cavasonza L. A. , Alpat B., Ambrosi G., Arruda L., Attig N., ...More

PHYSICAL REVIEW LETTERS, vol.119, no.25, 2017 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 119 Issue: 25
  • Publication Date: 2017
  • Doi Number: 10.1103/physrevlett.119.251101
  • Title of Journal : PHYSICAL REVIEW LETTERS

Abstract

We report the observation of new properties of primary cosmic rays He, C, and O measured in the rigidity (momentum/charge) range 2 GV to 3 TV with 90 x 10(6) helium, 8.4 x 10(6) carbon, and 7.0 x 10(6) oxygen nuclei collected by the Alpha Magnetic Spectrometer ( AMS) during the first five years of operation. Above 60 GV, these three spectra have identical rigidity dependence. They all deviate from a single power law above 200 GV and harden in an identical way.