A novel method for computing the full-energy peak efficiency of coaxial high-purity germanium detectors for cylindrical sources

In this work a novel method for computing the full-energy peak efficiency of coaxial HPGe detectors for cylindrical sources emitting photons in the range of 60–2000 keV is described. It has a solid theoretical basis using an integral expression for computing the full-energy peak efficiency via computed values of the detector response and the attenuation factor of point sources. The method was implemented as a Matlab code written for computing the full-energy peak efficiency of a Canberra detector. The code was extensively verified by intercomparison with GESPECOR and LabSOCS codes and the results are fit purpose e.g. in the measurement of environmental samples.