Directional correlation studies in the decay of^177gLu

Abstract

Directional gamma-gamma correlations of the strong 208.4–112.9 keV and of the weak 71.6–249.7 keV cascade transitions in the decay of^177gLu have been measured. The correlation coefficientsA ₂₂=−0.208±0.012 of the strong andA ₂₂=−0.105±0.005 of the weak cascade have been determined. The mixing ratioE2/M1 of −3.7±0.3 for the 112.9 keV transition and theM2/E1 of −0.0173±0.0065 for the 71.6 keV transition have been obtained. The deducedM2 admixture in the 71.6 keV transition is in good agreement with the theoretical estimates of Weisskopf and of Nilsson.