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
收藏
页码：87 / 92
页数：6
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