Concentrations of cosmic ray produced 7Be, 32P and 33P under mountain conditions

Concentrations and isotope ratio of the cosmogenic 7Be, 32P and 33P in the atmospheric air under mountain conditions were investigated in the Abastumani observatory area (Georgian SSR, 42 deg NL). Aerosol samples were taken by air filtration using the FPP-15-1.7 type filters at an altitude of 1700 m above the sea level. The radionuclide concentrations were determined by gamma and beta radiation after the filter ashing and chemical separation. The measured 7Be, 32P and 33P concentrations fluctuated respectively from 1.0 to 31.6, 0.01-0.33 and 0.006-0.37 at/g. The upper limits of the concentrations of these radionuclides were compared with those obtained in Vilnius under mountain conditions were one order lower. A conclusion is drawn that the intensity of the removal of aerosols from the atmosphere is higher in mountain areas