Effect of bremsstrahlung and Compton-electron induced summing on Ge-detector photopeak shapes

Appearance of the random summing shape on a shoulder of a photopeak shape was examined by co-acquisition of an EC decay source (54Mn) or a β− -IT transition source (137Cs137mBa) and precision pulser signals. An empirical functional modelling for the random summing shape can be made in the region close to the photopeak. The co-acquísition technique with the pulser revealed a direct measure of the random summing counting loss of the photopeak counts.