http://arxiv.org/abs/1804.04220
The experimental gamma-families in which events called “halos” were detected using X-ray emulsion chambers (XRECs) of the PAMIR experiment are described. The halo nature is explained within the standard model of nuclear interactions. Based on events with halo, the fraction of p+He in primary cosmic rays (PCR) was estimated. It is shown that the PCR mass composition remains mixed in the range E0 = 1-100 PeV.
R. Mukhamedshin, V. Puchkov, S. Pyatovsky, et. al.
Fri, 13 Apr 18
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