Efficiency calibrations of HPGe detector for PGNAA system

In this paper, the efficiency of a HPGe detector for a PGNAA system has been determined using the full peak energy of a ¹⁵²Eu source. The efficiency is affected by the detector-source distance for the full energy range. The Monte Carlo method was used to determine the detector's dead layer thickness. A comparison of the simulated and the experimental data on the spectra and efficiency curve shows a very good agreement. The combined results of an experimental and calculation efficiency curve provide information about the dead layer thickness of 2.1 mm. It was found that the dead layer has the greatest effect on the detection efficiency of the low energy range. (paper)