Abstract
Levels of were studied in the decay of and the decay of . Thirteen -ray transitions were observed for the first time, and additional information about multipolarities and mixing ratios was obtained. An analysis of the -ray branching ratios gives a measure of the transition probabilities between octupolevibrational states and the ground-state band, corresponding to for transitions and for . The latter transitions are three orders of magnitude faster than those that occur in the isotone , for which , from a direct measurement of the half-life of the 0, state. Estimates of the hindrance factors for transitions from octupole states in other heavy nuclei are given, and the validity of the calculations on which they are based is discussed.
RADIOACTIVITY [from (,)] measured , , , ICC. [from (,)()] measured ,. deduced levels, , (levels). Ge(Li) and Si(Li) detectors.
- Received 13 March 1981
DOI:https://doi.org/10.1103/PhysRevC.24.1175
©1981 American Physical Society