Multichannel Radiometer with Silicon Detectors for Ecological Research

Abstract Development of a multichannel radiometer consisting of three radiometers based on highly sensitive silicon detectors for environmental studies, recording and studying the activities of alpha, beta and gamma radiation in various environments. Three types of detectors were manufactured for the three radiometers. In the radiometer, lithium drift detectors were used to measure the activity of gamma radiation; to measure the activity of beta particles and the volumetric activity of radon, heterojunction or surface-barrier detectors were installed in the radiometers. The structure of the device and the electrical circuit have been developed. The manufactured detectors had low losses on the “input” and “output” windows, which made it possible to carry out measurements on both sides. The structure of the device using these detectors and the developed electrical circuit of the microcontroller node and nodes for amplifying and selecting information of the microcontroller node are presented. Monitoring data for gamma and beta radiation activities and volumetric radon activity are presented. The results showed the dependence of the volumetric activity of radon on humidity. Beta radiation activity did not show any dependence on humidity, but there was a sharp increase on certain days.