AN INVESTIGATION OF MASS COMPOSITION OF ULTRA-HIGH ENERGY COSMIC RAYS WITH ENERGIES ABOVE 1019 eV VIA THE STUDY OF EXTENSIVE AIR SHOWERS

被引：4

作者：

Doostmohammadi, S. ^{[1
]}

Fatemi, S. J. ^{[1
]}

机构：

[1] Shahid Bahonar Univ Kerman, Fac Phys, Kerman 7616914111, Iran

来源：

SERBIAN ASTRONOMICAL JOURNAL | 2012年 / 184卷

关键词：

cosmic rays;

D O I：

10.2298/SAJ1284087D

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The electron and muon components of extensive air shower (EAS) with energies above 10(19) eV are analyzed via various giant EAS arrays. A varying property of showers is observed for two energy ranges; higher and lower than (3 4) x 10(19) eV. The age parameter, zenith angle, shower size dependence on muon size and shower size dependence on primary energy show an increment of mass composition (MC) above (3-4) x10(19)eV. Comparison of the observed EAS results with the simulations of Capdevielle et al. (2000) and Shinozaki et al. (2005) gives at most 20% photon fraction for primary energies above 10(19) eV. The arrival directions of showers above 4x10(19) eV indicate an increasing concentration towards the super galactic plane.

引用

页码：87 / 92

页数：6

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