Spectral Intensities of Antiprotons and the Nested Leaky-box Model for Cosmic Rays in the Galaxy

  title={Spectral Intensities of Antiprotons and the Nested Leaky-box Model for Cosmic Rays in the Galaxy},
  author={Ramanath Cowsik and Tsitsi Madziwa-Nussinov},
  journal={The Astrophysical Journal},
In this paper we note that the spectral intensities of antiprotons observed in Galactic cosmic rays in the energy range ~ 1-100 GeV by BESS, PAMELA and AMS instruments display nearly the same spectral shape as that generated by primary cosmic rays through their interaction with matter in the interstellar medium, without any significant modifications. More importantly, a constant residence time of ~ 2.5 +/-0.7 million years in the Galactic volume, independent of the energy of cosmic rays… 
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