Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8132667 | Astroparticle Physics | 2018 | 7 Pages |
Abstract
Characteristics of  γ-ray families with halos observed with X-ray emulsion chambers at the Pamirs and data of EAS experiments are analyzed to estimate the summary fraction of proton and helium nuclei (pâ¯+â¯He) in the primary cosmic radiation (PCR) at E0â¯=â¯1-100 PeV. It is shown that the pâ¯+â¯He fraction at E0â¯=â¯10 PeV is (39â¯Â±â¯6) %. The mass composition, estimated by EAS age, remains mixed at E0â¯=â¯1-100 PeV with a tendency to become heavier with increasing energy.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
R.A. Mukhamedshin, V.S. Puchkov, S.E. Pyatovsky, S.B. Shaulov,