Coincidence summing of X- and gamma rays of 75Se

Dušan Novković; Ivana Vukanac; Aleksandar Kandić; Mirjana Durašević; Zoran Milošević

doi:10.1016/j.apradiso.2011.10.001

Coincidence summing of X- and gamma rays of 75Se

Appl Radiat Isot. 2012 Mar;70(3):520-7. doi: 10.1016/j.apradiso.2011.10.001. Epub 2011 Oct 13.

Authors

Dušan Novković¹, Ivana Vukanac, Aleksandar Kandić, Mirjana Durašević, Zoran Milošević

Affiliation

¹ Institute of Nuclear Sciences "VINČA", University of Belgrade, Serbia. dusann@vinca.rs

PMID: 22100377
DOI: 10.1016/j.apradiso.2011.10.001

Abstract

A study of coincidence summing of X- and gamma rays of (75)Se has been presented in this paper. The computation of the (75)Se spectra was performed by application of the previously published theory by Novković et al. The method enables the treatment of all possible single and sum peaks of (75)Se. The calculation gave the 419 decay path outcomes, resulting in 84 peak count rate equations and also the total count rate equation. By HPGe spectrometers with 15% and 18% relative efficiency, 20 and 30 peaks were recorded, respectively. Some simplification of the decay scheme was introduced and existing metastable level had to be treated separately. Nevertheless, the experimental values of the peak count rates were in good agreement with the theoretical evaluation.