Assessment of the Soil Self-Attenuation Correction Factor to Determine the Efficiency of a High-Purity Germanium Detector

摘要

The experimental attenuation coefficient of ten soil samples was measured for a 661.66 keV photon belonging to Cs-137. The chemical composition of the samples was determined by XRF method, and according to the results, the mass attenuation coefficient was calculated using MCNP software. For each sample, a hypothetical elementary compound based on the experimental attenuation factor was presented. HPGe efficiency was calculated using MCNP software based on the elemental composition measured by XRF and hypothetical method. The result was compared with the experimental value, which showed good agreement. In this study, self-absorption correction was determined in gamma-ray spectrometry of environmental samples.