Experimental studies of positive and negative atmospheric muons with a cosmic rays telescope

An experiment has been developed for the measurement of the muon charge ratio (ratio of positive to negative muons) in the cosmic ray flux in energy range 0.236-0.242 GeV. The muon charge ratio is found to be 1.35 ± 0.10 with a mean zenith angle of 32° ±  5°. Meanwhile, the distributions of muons in zenith (θ) and azimuth angles have been studied. A cosnθ distribution with n = 1.95 ±  0.13 has been obtained. An asymmetry has been observed in East-West directions because of geomagnetic field.