Monte Carlo calculations of nuclear cascades and associated Cerenkov radiation in extensive air showers

Physics

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Cerenkov Radiation, Cosmic Ray Showers, Monte Carlo Method, Nuclear Radiation, Angular Distribution, Computerized Simulation, Energy Spectra, Gamma Rays, Muons, Nucleons, Pions, Primary Cosmic Rays, Scattering Cross Sections

Scientific paper

We present a Monte Carlo calculation, with observed cross sections and multiplicities, of the nuclear component of small extensive air showers (EAS) with primary energies above 1,000 GeV. The simulations were completely three-dimensional and were initiated by cosmic rays sampled from both their primary energy and mass spectra. Resulting particle spectra sampled at 564 g per sq cm agree with extrapolations from observations of EAS with primary energies above 10,000-1,000,000 GeV. The optical Cerenkov radiation calculated for the nuclear-active particles and muons in these EAS is found to be comparable to that expected from the electrons and distinguishable for particular detector configurations. Implications for EAS observations of cosmic gamma rays and cosmic-ray composition are mentioned.

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