HPGe detector absolute-peak-efficiency calibration by using the ESOLAN program

A personal computer based program ESOLAN has been developed for HPGe detector effective-solid-angle calculation. This program is very useful in constructing the absolute-peak efficiency (εp) vs γ-ray energy (Eγ) curves for various counting geometries. In this work, the validity of using this program for εp-Eγ calibration was successfully demonstrated with four individual HPGe detector systems for γ-rays in the energy range not, vert, similar 60 keV−not, vert, similar 2.7 MeV. The overall uncertainty on the final εp-Eγ curves was estimated to be not, vert, similar3%.