Monte Carlo determination of full energy peak efficiency for a HPGe detector

The Monte Carlo method was used to determine full energy peak efficiency of a high-purity germanium (HPGe) co-axial detector within the energy range of 59.5–1836 keV. Plotted ratios of the experimentally derived efficiency data over the fitted values showed oscillations at certain energies attributed to the characteristics of the detector. Results obtained by the Monte Carlo yielded deviations between 0.2 to 12% from the experimental data.