Abstract
The lifetime of the 9.155 MeV state in has been measured to be < 13 fsec from a study of the reaction at MeV. The decay from the 9.155 MeV state to the 5.30 MeV state is established as and thereby determines the parity of the 9.155 MeV state to be positive. Particle-gated -ray spectra from and reactions show that the 9.155 MeV state has a large triton cluster parentage. The other member of the unresolved doublet, the 9.152 MeV state, has a very small cluster parentage. These results are in disagreement with simple + interpretations of but agree with weak coupling model calculations.
NUCLEAR STRUCTURE , MeV; , MeV, measured cross section to 9.155 and 9.152 MeV states; deduced lifetime and parity of 9.155 MeV state, compared to cluster and shell models.
- Received 27 June 1978
DOI:https://doi.org/10.1103/PhysRevC.18.2145
©1978 American Physical Society