Simple method for true coincidence summing correction

Abstract

For the correction of losses due to true coincidences summing and edge effect, a simple method which is based on the ratio of a reference single γ-ray energy to that of cascade energies at near and far geometry is developed. The correction factors for several radioactive sources with simple and complex decay schemes are experimentally determined for three types of germanium detectors. It is shown that coincidence summing can be a complex effect and depends on the individual detector, the counting geometry and on the decay scheme of the radionuclide concerned.