Determination of gamma-ray emission probabilities per decay of Ga-68

摘要

The measurement of the gamma-ray emission probabilities per decay of 1077 keV of ~(68)Ga is presented. The standardization system consists of a gas-flow proportional counter in 4π geometry coupled to an HPGe detector for the gamma-ray detection. The gamma-ray emission probabilities per decay were measured in an HPGe gamma-ray spectrometer. The weaker gamma-ray intensities of ~(68)Ga were measured in a relative way, making use of an uncalibrated ampoule of ~(68)Ge-~(68)Ga in radioactive equilibrium, and considering the absolute result from the 1077 keV gamma-ray.