Pages: 109-118

Authors: Nevenka M. ANTOVIĆ, Nikola SVRKOTA

Abstract

Detection efficiencies of ²²⁶Ra and ²³²Th decay products, as well as corresponding minimum detectable activities in different modes of counting of the PRIPYAT-2M spectrometer (integral, when all pulses - coincident and non-coincident, are counted; non-coincident, when only non-coincident pulses are counted; coincident, when coincident pulses of multiplicity from 2 to 6 are counted), in energy ranges of 200 keV to 2000 keV and 300 keV to 3000 keV are presented here. It has been shown that the mode of double coincidences is the optimum one for measuring radium and thorium activity. In this mode of counting, the sensitivity of the spectrometer is the highest.

Key words: radium, thorium, multidetector spectrometer, detection efficiency, gamma-coincidences

FULL PAPER IN PDF FORMAT (1.67 MB)