Numerical investigation of coincidence-correction in gamma spectroscopy

Abstract

For precise activity analysis of radioactive isotopes in environmental samples the inclusion of coincidence correction is necessary. The summing-in and -out effects caused by gamma cascades lead to systematic errors. I investigate the effect of coincidence correction on an HPGe detector using Semkow matrix formalism. I simulate the detector using Geant4 to fit it´s efficiency curves to calculate the corrected relative intensities. I apply the correction to a real measurement´s 208Tl peaks.