On evolution of Primary Cosmic Ray mass composition in the energy region 10¹⁴-10¹⁶ eV

2013/11/05 by Novoseltsev, Yu. F., Vereshkov, G. M.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1311.0970

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 10¹⁴-10¹⁶ eV. In the region 10¹⁵-10¹⁶ eV our analysis points to a lightening of the mass composition from p+α≃ 0.54, ⟨ ln A ⟩ ≃ 1.97 to p+α≃ 0.69, ⟨ ln A ⟩≃ 1.56.

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