TY JOUR TI FSUE SRI IMM: Evolution of Devices for Radon Control and its DPR KW alpha-spectrometer KW radiometer KW radon KW volume activity KW equivalent activity KW aerosol-unattached fraction of the radon decay progeny KW effective radiation dose KW absorbed radiation dose JO ANRI AU Shkrabo, I.V. AU Gusev, A.V. PY 2020 IS PB Scientific-Production Enterprise “Dosa”