Investigation of the Possibility of Expanding the Range of Working Distances for Calibrating Spectrometric Standards of Activity for Radionuclides

Abstract

It was necessary to determine the possibility of expanding the range of working distances used in calibrating spectrometric standards of activity for radionuclides, which will make it possible to reduce number of standard measures needed for calibration. The approach proposed here consists in checking the shape integrity of the total absorption peak and the stability of the photon detection efficiency in the total absorption peak in a given geometry of the standard spectrometric gamma sources (SSPGS) and makes it possible to extend the lower bound of the activity range of the radionuclides of the calibrated SSPGS.