Speaker
Dr
Alexander Borisov
(P.N.Lebedev Physical Institute, RAS)
Description
A detailed study of X-Ray emulsion chamber response with ECSim 2.1 computer package adopted from GEANT 3.21 code and suited for imitation of measuring procedures, employed in the Pamir experiment makes it possible to determine more accurately the proton fraction in the primary cosmic ray (PCR) flux at energies around the “knee” E_0=1-100 PeV. In particular, it is shown that the proton fraction in the PCR slowly decreases from 20% at E_0 ~ 1 PeV to 15% at E_0 ~ 10 PeV.
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Primary author
Dr
Alexander Borisov
(P.N.Lebedev Physical Institute, RAS)
Co-authors
Dr
Evgeniya Kanevskaya
(P.N.Lebedev Physical Institute, RAS)
Mr
Mikhail Kogan1
(P.N.Lebedev Physical Institute, RAS)
Dr
Rauf Mukhamedshin
(Institute for Nuclear Research, RAS)
Dr
Valentina Denisova
(P.N.Lebedev Physical Institute, RAS)
Dr
Vitaliy Puchkov
(P.N.Lebedev Physical Institute, RAS)