FLUCTUATIONS OF Xmax AND PRIMARY PARTICLE MASS COMPOSITION IN THE RANGE OF ENERGY 5 × 1017 - 3 × 1019EV BY YAKUTSK DATA

Author:

KNURENKO S. P.1,IVANOV A. A.1,KOLOSOV V. A.1,PETROV Z. E.1,YE. SLEPTSOV I.1,STRUCHKOV G. G.1

Affiliation:

1. Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy Lenin Avenue 31, Yakutsk, RU-677891, Russia

Abstract

The experimental distributions of X max obtained with the Yakutsk EAS array at fixed energies of 5 × 1017, 1 × 1018 and 5 × 1018 eV are analysed. A recent version of the QGSJET model is used as a tool of our analysis. In the framework of this model, the most adequate mass composition of primary particles satisfying the experimental data on X max is selected.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

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