MUONS WITH Eth ≥ 1 GEV AND MASS COMPOSITION IN THE ENERGY RANGE 10 18 − 10 20 EV OBSERVED BY YAKUTSK EAS ARRAY
The ratio of the muon flux density to charged particle flux density at distances of 300 and 600 m from the shower axis (ρµ(300)/ρs(300) and ρµ(600)/ρs(600)) is measured. In addition, the energy dependence of ρµ(1000) is analysed for showers with energies above 10 18 eV. A comparison between the expe...
Main Authors: | , , , , , |
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Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2004
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Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.255.3073 http://arxiv.org/pdf/astro-ph/0411683v2.pdf |
Summary: | The ratio of the muon flux density to charged particle flux density at distances of 300 and 600 m from the shower axis (ρµ(300)/ρs(300) and ρµ(600)/ρs(600)) is measured. In addition, the energy dependence of ρµ(1000) is analysed for showers with energies above 10 18 eV. A comparison between the experimental data and calculations performed with the QGSJET model is given for the cases of primary proton, iron nucleus and gamma- ray. We conclude that the showers with E0 ≥ 3 × 10 18 eV can be formed by light nuclei with a pronounced fraction of protons and helium nuclei. It is not excluded however that a small part of showers with energies above 10 19 eV could be initiated by primary gamma-rays. |
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