Summing coincidence correction for x-ray measurements using the HPGe detector with a low background shielding system

摘要

A Monte Carlo method based on the GEANT4 toolkit has been developed to correct the full-energy peak (FEP) efficiencies of a high purity germanium (HPGe) detector equipped with a low background shielding system, and moreover evaluated using summing peaks in a numerical way. It is found that the FEP efficiencies of (60)~Co, (133)~Ba and (152)~Eu can be improved up to 18% by taking the calculated true summing coincidence factors (TSCFs) correction into account. Counts of summing coincidence y peaks in the spectrum of (152)~Eu can be well reproduced using the corrected efficiency curve within an accuracy of 3%.