Abstract
The 4.32- and 4.81-MeV levels of and the 6.79- and 6.86-MeV levels of , have been studied using the particle-gamma angular-correlation method of Litherland and Ferguson. The spin of the 4.32-MeV level has been established as and the mixing ratio for the transition 4.32 → 0 has been measured: . A probable spin assignment has been determined for the 4.81-MeV level. For this assignment, the mixing ratios of the 4.81 → 2.0 and 4.81 → 0 transitions have been obtained: and , respectively. A spin assignment of has been confirmed for the 6.79-MeV level. The 6.86-MeV level has probably a spin , but cannot be eliminated. The mixing ratios for the 6.86 → 5.24 () and the 5.24 → 0 () transitions were found to be and or +(), respectively. The results are compared to previous experiments and theoretical predictions.
- Received 6 June 1966
DOI:https://doi.org/10.1103/PhysRev.151.735
©1966 American Physical Society