Cosmic Ray Observation on Mt. Huzi

Abstract

The angular distribution of the cosmic radiation has been investigated as a function of the angle from the vertical on the summit of Mt. Huzi (γ=35°22', elevation 3700m), at a base station (Gotenba, elevation 460m) and at two stations between them (elevations 2800m and 1300m). The east-west effect has also been studied. The distributions at all stations are similar in concentration about the vertical, showing the composite nature of the radiation, Excess of some 10 to 15% of west over east-value is clearly recognized at an angle 30° at all stations. At an angle 60° the excess appears clearly on the summit. The mean absorption coefficient was calculated with the assumption of simple exponential law with the result μ=34.3×10^-3g^-1cm². (period of observation: 1934, August-September)