Multipole mixing ratios of transitions in175Lu populated from the decay of175Hf

Abstract

Abstract. Electron capture decay of 175Hf(70 d) provides a possibility for unambiguous determination of the sign and magnitude of multipole mixing ratios for 89 keV and 114 keV transitions in lVSLu. This is because both gamma rays are in coincidence with the 230 keV transition which is of a pure E2 character. The results of the 7-7 directional correlation measurements, in terms of E2/M 1 mixing ratios &, are 689--0.11_ 0.07 and 5114 = 0.465 4-0.005. In addition the directional correlation measurements of the 89 7-343 7 and 319 7-114 7 cascades yield 6343 = 0.08 4-0.07 and 6319 = -0.152 _+ 0.015. Radioactivity 175Hf from lV4Hf(n, 7); measured 7-7(0) deduced 6(E2/M1); Ge(Li) detectors.