Abstract: “The paper summarizes the results of studies by the authors of the gas-discharge method for the fast remote registration of alpha and beta radioactive contaminants on the surfaces of a complex profile and in limited volumes of workplaces of radiation-hazardous objects. Specific features of technical solutions ensuring the detection stability of alpha and beta radiation with the help of a gas-discharge counter open to the air are considered. The design variants and main characteristics of search devices are given that allowing quickly (less than 3 seconds) detecting spot and distributed alpharadioactive contamination at distances of about 50 cm. The design and operation modes of the portal pedestrian radiation monitor recording small alpha and beta radioactive contamination on clothes and open parts of a person's body are shown.”

Keywords: alpha-radioactivity, beta-radioactivity, remote registration, ionization of air, light air ions, gas discharge method, ion track, counting mode, portal radioactive monitor