Primary energy spectrum of cosmic ray at the "knee" region observed with the Huairou air array.

Details Primary energy spectrum of cosmic ray at the "knee" region observed with the Huairou air array. Primary energy spectrum of cosmic ray at the "knee" region observed with the Huairou air array.

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hepnp..19..769l&link_type=abstract

High Energ. Phys. Nucl. Phys., Vol. 19, No. 9, p. 769 - 774

Physics

Cosmic Rays: Energy Spectra

Scientific paper

650 thousands of EAS events recorded by the Huairou EAS array have been analysed carefully. The size spectrum and primary energy spectrum in the region from 1013 to 1016 eV are obtained. The energy spectrum shows a clear and smooth "knee" structure around 3×1015 eV. Except for the smooth steep feature of the "knee", it is consistent very well with the Akeno spectrum. Under the assumption of the so-called rigidity-dependent cut model, by adjusting the breaking energy Ec of the primary proton spectrum in the Monte Carlo simulation and comparing it with the experimental spectrum, we found that the proper value of Ec is in the energy range from 160 to 240 TeV.

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