Precision measurements of gamma-ray intensities V. 160Tb, 168Tm and 182Ta

Abstract

Relative intensities of gamma rays in the decays of 160Tb, 168Tm and 182Ta were precisely measured with a calibrated Ge(Li) detector. Experimental errors for strong gamma rays are 0.5–1%. A few new weak gamma rays for 168Tm and 182Ta were observed. Gamma-ray intensities per decay of three nuclides were derived from each of the relative intensities. These long-lived nuclides which emit multi-gamma-rays are useful for calibration of the gamma-ray spectrometer.