Abstract
An accurate measurement of the energy of a gamma transition from the 7.56-Mev level in discloses that the transition takes place to the 5.19-Mev level in rather than to the 5.25-Mev level. Another transition takes place through the 6.15-Mev level. The third known transition occurs through the 6.79-Mev level rather than through the 6.86-Mev level. The angular correlations of cascades from the 7.56-Mev level through the levels at 6.79 Mev, 6.15 Mev, and 5.19 Mev are measured. These results, combined with previous results on these levels, are consistent only with , respectively, for the 6.79-Mev and 6.15-Mev levels. For the 5.19-Mev level, the present results indicate , but are consistent also with , if a suitable mixing ratio of to radiation is chosen. The preferred assignments are all consistent with the shell-model predictions and with comparisons with the level scheme. It is noted that the doublets near 5.2 Mev in and are reversed in order.
- Received 2 March 1959
DOI:https://doi.org/10.1103/PhysRev.115.608
©1959 American Physical Society