BALQARAD Geant4 Model: Enhancement in γ-ray Spectroscopy and Validation

Abstract

Advances in gamma-ray spectroscopy allow for excellent background
suppression and increased efficiency using composite Clover detectors with combinations
of active shields. The events from such combinations, registered in list mode and analyzed
offline, promote significant sensitivity improvements for gamma detection. This study
utilizes the modularity of such composite of high-purity germanium radiation detectors to
investigate their applicability in different possible fields. A comprehensive survey is
conducted on the appropriate radioactive isotope serving each application. According to its
decay scheme, investigation on the proper modes of operation for each isotope is carried
out by Monte Carlo simulation applied to the Clover detector geometry. Addback factor
measurements were performed using the newly acquired BALQARAD Clover. In an
offline analysis through self-developed software, the Clover direct and addback
performances are deduced versus gamma-ray energy. Measurement results obtained using
the Clover detectors agree reasonably well with those obtained by Monte Carlo simulation.