Detectors on base of scintillation structures for registration of volumetric activities of gaseous and liquid media gamma radiation

The main aim of this research is the development and prototyping of the ionizing radiation detectors for the diagnosis of the physical processes used for monitoring the radiation situation at the thermal or fast neutrons reactors. In this article we present the experimental verification of applicability of the scintillation detectors based on LaBr₃(Ce) and YAlO₃(Ce). The experimental studies of the gamma-ray detection with several designs of the crystal scintillation detectors in gas and liquid are considered. It was shown that the measurement range in the liquid medium at the duration of one measurement of 100 seconds for ¹³⁷Cs equals from 3.79·10² Bq/l to 1.08·10⁸ Bq/l for detector prototype based on YAlO₃(Ce). (paper)