Zenith Angles Distributions of Hadrons at Mountain Altitude (600 g/sq.cm) in CORSIKA Simulations

Zenith angle distributions of hadrons registered in the Pamir experiment have shown unexpected peak for small angles (θ ≈ 7.5o ). Calculations simulating penetration of primary cosmic ray particles through the atmosphere to 600 g/cm2 level (which corresponds to the Pamir experiment level 4370 m a.s.l.) have been made. Program CORSIKA with QGSJET model has been used. In this paper distributions of zenith angles θ and of cos(θ) have been shown for various types of hadrons, electrons and gamma quanta at mountain altitude. θ and cos(θ) distributions of hadrons registered in the Pamir experiment have been presented and compared with the results of calculations.