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arXiv · 1311.0970

On evolution of Primary Cosmic Ray mass composition in the energy region $10^{14}-10^{16}$ eV

Yu. F. Novoseltsev·G. M. Vereshkov
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Abstract

A new method of determining Primary Cosmic Ray mass composition is proposed. The method is based on quasi-localization of the integral equation for the Extensive Air Showers spectrum versus the total number of high energy muons ($E_μ\geqslant 235$ GeV) and an expansion of the experimentally measured spectrum in spectra of five group of primary nuclei. The cosmic ray mass composition is established in the energy region $10^{14}-10^{16}$ eV. In the region $10^{15}-10^{16}$ eV our analysis points to a lightening of the mass composition from $p+α\simeq 0.54,\ \langle \ln A \rangle \simeq 1.97$ to $p+α\simeq 0.69,\ \langle \ln A \rangle\simeq 1.56$.

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Yu. F. Novoseltsev, G. M. Vereshkov. 2013-11-16. On evolution of Primary Cosmic Ray mass composition in the energy region $10^{14}-10^{16}$ eV. https://arxiv.org/abs/1311.0970

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