Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....1..135m&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
1
Scientific paper
Energy spectra of hadrons registered in carbon emulsion chambers have been obtained from the Pamir experimental data. Calculations simulating propagation of primary cosmic ray particles through the atmosphere to the mountain level have been done with the use of the CORSIKA program with QGSJET model. Comparison of the experimental data with the calculated spectra enables to state that primary cosmic ray for energies from 1013 eV up to 5 · 1015 eV have light mass composition. In the energy interval above 1015 eV primary cosmic ray have the following mass composition: over 50% of light nuclei (ab out 30% pand over 20% He) and about 14% Fe. Average logarithm of mass number < lnA > varies from 1.57 for Eo = 1013 eV up to 1.85 for Eo = 5 · 1015 eV .
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