Possible Nuclear Structure Effects in Even-Even Osmium Nuclei

A compilation of the multipole mixing of 2 ' H — v 2 f transitions in 1 8 60s, 1 8 80s, 190Os and 1 9 20s is given. In view of recent results obtained at our laboratory, indicating large anomalies in the conversion process of inhibited M l transitions, the study has been extended for even-even Osmium nuclei. A series of experiments has been performed in which the conversion coefficients and transition probabilities were measured. The data of 2 ' H — > 2 + transitions were analysed by taking into account nuclear structure effects on the M l internal conversion process. The M l admixtures obtained are compared with Greiner's calculations. Values of reduced transition probabilities B (E2, 0 2 + ) , B (E2, 2 ' + > 2 + ) , the mixing ratio 8 = <2 || E2 || 2 ' ) / <2 || M l || 2 ' ) and the transition brandling ratio T (2' 2 ) / T ( 2 ' —• 0) are reported for second and higher 2 + states. The results are compared to the pairing-plus-quadrupole model calculations of Kumar and Baranger.