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The propagation in space of cosmic-ray helium nuclei and the slope of their energy spectrum

  • M. V. Krishna Apparao
Article
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Abstract

Cosmic-ray helium nuclei, along with heavier nuclei, traverse interstellar and interplanetary matter during their propagation from their “source” to the earth. Ionisation and spallation losses during this traversal modify the energy spectra with which they started. Taking these effects into account, a calculation has been made of the abundance of helium nuclei relative to that of heavier nuclei (charge Z⩾6) as a function of energy and the amount of matter traversed. A comparison of the results with the experimental observations suggests that the exponents of the energy spectra of the helium and heavier nuclei should differ by ∼0·25 at the “source”.

Keywords

Energy Spectrum Heavy Nucleus Interplanetary Space Cosmic Radiation Helium Nucleus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Indian Academy of Sciences 1965

Authors and Affiliations

  • M. V. Krishna Apparao
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay-5India

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