Abstract
Detailed computer simulations have been made for the air Cerenkov radiation produced in large cosmic-ray showers. The hadron cascade employed in the air shower simulation incorporates Feynman scaling; primary particles ranging in mass from protons to iron nuclei are considered. The simulation results compare well with recent measurements of the average characteristics of Cerenkov light from large cosmicray showers made with a synchronized array of fast photomultipliers at the Haverah Park EAS array; satisfactory overall agreement is found between the observations and the predictions for showers of primary energy (≈2·1017÷≈2·1018) eV having their electron cascade maximum at depths in the atmosphere of (≈680÷≈770) g cm−2. For the cascade model employed here these depths of maximum arise for a heavy primary mass composition.
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