2010/10/29 by Romen Martirosov, Р. М. Мартиросов, Aleksander Garyaka +22
Biochemistry, Genetics and Molecular Biology · Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Geomagnetism and Paleomagnetism Studies #Geophysics and Gravity Measurements #Spacecraft and Cryogenic Technologies #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1010.6260
Invited talk presented at the XVI International Symposium on Very High Energy Cosmic Ray Interactions, ISVHECRI 2010, Batavia, IL, USA (28 June -- 2 July 2010). 4 pages, 5 figures
arxiv created 2010/10/29 · arxiv updated 2015/03/17
The present status of the GAMMA facility consisting of an enlarged surface EAS array (116 of 1 m2 scintillation detectors) and underground muon carpet (150 m2 detectors) is described. The recent results on mass composition and energy spectrum at the energy region above the knee obtained on the basis of the GAMMA experimental data are presented. It is shown that the power law after the knee is not invariable like -3.1. The slope of the energy spectrum becomes more flat at E0>20 PeV. The strong irregularities of the energy spectrum at about 70-80 PeV are discussed in comparison with other experiments. The bump can be described by a two-component model of primary cosmic ray origin, where additional (pulsar) Fe components are included with a very flat power law energy spectrum.