Study on the optimal of cylinder sample geometries using Monte Carlo simulation for low background gamma spectrum analysis method

The efficiency of a low background gamma HPGe spectrometer is a significant factor in the determination of the specific radioactivity of environmental samples. Since the diversity of geometry and density of environmental samples, the gamma standard sources insufficient for the efficiency calibration. Hence, the Monte Carlo simulation method is a suitable choice for this purpose. In this study, GEANT4 and MCNP software are used to simulate and optimization cylindrical container geometries of environmental samples for measurement on low background gamma spectrometry system. (author)