Abstract
Mixing ratios of some gamma-ray transitions in , , and have been studied by particle-gamma angular-correlation measurements for the reactions , , and . The outgoing particles were detected close to 180° in an annular counter. For the beam energies available it was possible to study all the bound states of , but only the 5.18-5.24-MeV doublet (unresolved) and the 6.16-MeV level of could be studied in detail. An attempt was also made to obtain the mixing ratio of the ground-state transition from the 3.85-MeV level of . Spin assignments were verified wherever possible and the spin of the 5 24-MeV level of has been established as Gamma-ray branching ratios were determined for the levels of and were generally in agreement with previous work. Strong evidence was found for a weak transition between the 5.10-MeV and 3.95-MeV states of , but the previously reported transition between 7.03 and 3.95-MeV states was not observed. Correlations for the reaction were measured at four different energies, since they can vary with energy. It was found from the correlations that the levels were strongly populated in the substate. This has been interpreted as due to a direct interaction, possibly heavy-particle stripping.
- Received 16 March 1966
DOI:https://doi.org/10.1103/PhysRev.149.801
©1966 American Physical Society