Study on the stabilizing factor of the discrete-integral method for radiation detection in scintillation radioisotope instrument

An experimental investigation of the stabilizing factor of the discrete method for recording a radiation flux is described. The investigation makes use of comparative measurements of a radiation flux by the discrete and analog methods under comparable conditions and with the same variations due to changes in the conversion coefficient of the measuring channel, and first of all, of the radiation detector. Beta particles of 90Sr+90Yt isotope from the standard BIS-10 source were detected in the experiment. A scintillation counter (photomultiplier-13 and a crystal of stilbene) was used as radiation detector. The experimental results comparable with theoretical data show that the stabilization factor of the discrete-integral method for recording an ionizing radiation flux at Esub(n)/Esub(m) much less than 0.3 ensures very accurate measuring apparatus with a stabilization factor up to 100 without applying high requirements for the radiation detector parameter stabilization (Esub(n) is the threshold energy of the particle (quantum). Esub(m) is the maximum energy of the recorded radiation spectrum)