Abstract
EAS initiated by primary gamma -quanta with constant size at mountain altitude are simulated using three-dimensional Monte Carlo procedures based on a realistic phenomenological interaction model SM1. The definitive role of the reception conditions of the applied EAS arrays for the selection of showers initiated by primary gamma -quanta with ultra-high energies is shown. The criterion (Eh/Ee)r<or=3m<or=1.4*10-2 to select hadron-poor EAS as gamma -showers is confirmed for the Tien Shan experiment. It is shown that only the method of hadronless EAS selection offers a real possibility for a full separation of showers initiated by primary gamma -quanta, from the background events.
Published Version
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