Summing coincidence in rare event gamma-ray measurements under an ultra-low background environment

Abstract

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 \mbox{coincidence} factors (TSCFs) correction into account. Counts of summing coincidence $\gamma$ peaks in the spectrum of ${}^{152}$Eu can be well reproduced using the corrected efficiency curve within an accuracy of 3\%.

arXiv commentreplace with the accepted version

References in corpus (4)

• Alpha-induced cross sections of 106Cd for the astrophysical p-process
• Cross sections for proton-induced reactions on Pd isotopes at energies relevant for the gamma process
• Characterization and modeling of a low background HPGe detector
• Cross-section measurement of the ${}^{130}$Ba(p,$\gamma$)${}^{131}$La reaction for $\gamma$-process nucleosynthesis

Cited by in corpus (2)

• Intrinsic radiation background of LaBr${}_3$(Ce) detector via coincidence measurements and simulations
• Measurements of ${}^{160}$Dy($p,\gamma$) at energies relevant for astrophysical $\gamma$ process