gamma-ray spectrometry;
Ge detectors;
coincidence summing effects;
detector dead layer;
D O I:
10.1016/j.apradiso.2003.11.011
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
In this work, coincidence summing correction factors have been measured for Ba-133, Eu-152 and Y-88 point sources with a 50% relative efficiency p-type detector and a 25% relative efficiency n-type detector in two close-to-detector measurement geometries. The experimental data for Ba-133 and Eu-152 and the results obtained with the GESPECOR software reveal a complex structure of the conventional dead layer of the p-type detector. The high value of the coincidence summing correction factor for the 511keV peak of Y-88, in agreement with the values computed by GESPECOR, in this case cautions against the application of the semiempirical method for evaluating coincidence summing effects. (C) 2003 Elsevier Ltd. All rights reserved.