Gamma-Ray Families With Halos: Main Characteristics And Possibilities Of Using Them To Estimate The P Plus He Fraction In The Mass Composition Of Cosmic Rays At Energies 1-100 Pev

A. S. Borisov,V. G. Denisova,Z. M. Guseva,E. A. Kanevskaya,S. E. Pyatovsky,M. G. Kogan,A. E. Morozov,R. A. Mukhamedshin,V. S. Puchkov,S. B. Shaulov,G. P. Shoziyoev,M. D. Smirnova

ISVHECRI 2016 - XIX INTERNATIONAL SYMPOSIUM ON VERY HIGH ENERGY COSMIC RAY INTERACTIONS（2017）

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Abstract

Characteristics of gamma-ray families with halos (XREC, Pamir) and data of experiments with EAS are analyzed to estimate the proton and helium (p+He) fractions in the primary cosmic radiation at E-0 = 1-100 PeV. It is shown that at energies E-0 similar to 1-100 PeV the fraction of p+He remains significant, namely, the fraction of p+He is near 40% at E-0 = 10 PeV.

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Gamma-Ray Astronomy

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