MONTE-CARLO SIMULATION OF MUON DIRECTION FOR PARTICLE ASTRONOMY APPLICATIONS

We report on the Monte-Carlo simulation results in order to see the difference between the cosmic ray primary particle's angle of incidence and the muon's azimuth. The simulations have been performed using the CORSIKA code applied for different primary particle energies and incident angles. The CORSIKA code is a versatile program for particular simulation of cosmic ray extensive air showers induced by high energetic primary cosmic rays. The observed difference between the primary particle's incident angle and the muon azimuth is smaller with the increase of the muon's energy. The difference decreases from several degrees up to less than 0.1 degrees for muon's energies greater than 150 GeV. Based on the results we had started some simultaneous measurements of the underground muon flux correlated with observation of the sky by using an optical telescope. The measurements of the muon flux are currently in progress using the directional detector (Si-RO) located in the underground laboratory of IFIN-HH from Slanic Prahova.