Abstract
Uncertainty propagation to the γ-γ coincidence-summing correction factor from the covariances of the nuclear data and detection efficiencies have been formulated. The method was applied in the uncertainty analysis of the coincidence-summing correction factors in the γ-ray spectrometry of the 134Cs point source using a p-type coaxial HPGe detector.
Highlights
IntroductionLarge volume detectors and close source-to-detector geometry provide high geometrical efficiency for gamma radiation detection
Photon spectrometry is widely applied in nuclear sciences and applications
It results in occurrence of true coincident summing events leading to peak intensity increase, peak intensity loss, or new γ-lines in the spectrum
Summary
Large volume detectors and close source-to-detector geometry provide high geometrical efficiency for gamma radiation detection. The magnitude of the resultant true coincident summing (TCS) correction factor [1, 2] varies greatly with the decay properties of the considered nuclide, full energy, and total efficiencies of the detector. Various approaches to account for all possible cascade de-excitations and emitted radiation in the quantitative estimation of the TCS correction factors have been published. In this work explicit formulae for the propagation of the uncertainties in the peak and total efficiencies, β− transition probability, γ transition+internal conversion probability and internal conversion coefficient to the uncertainty in the TCS correction factor based on the model proposed by Andreev et al [3, 4] are presented. The correlations of the different attributes in the ratio were taken into account as well
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