Determination of multipolarities and mixing ratios of some γ transitions following 125Sb decay by γ–γ Angular Correlation

125Sb decays by β− emission to 125Te with a half-life of 2.76 years. The angular correlations of some γ-ray transitions of this decay have been studied in order to determine their multipolarities and mixing ratios. The experimental set-up included a planar-Ge detector to measure the low-energy γ-rays, a coaxial Ge detector and a movable device to determine precisely the angle between the axes of the detectors. Results obtained in the experiments and other available data were processed to obtain the best values for the mixing ratios.