Abstract
The reactions , , and are studied using 15-Mev deuterons and magnetic analysis of reaction particles. Absolute cross sections are determined for all reactions studied and the Butler-Born approximation is used to extract reduced widths when possible. Angular distributions of triton groups corresponding to the ground, 0.871-, 3.846-, 4.555-, 5.083-, and 5.378-Mev states of are obtained. An estimate of the configuration admixtures in the ground state is made from analysis of the reduced widths and indicates the presence of a sizable (about 6%) component. The experimentally determined admixtures are compared with several theoretical estimates. All levels observed in the inelastic deuteron scattering have been previously reported—the known 5.01-Mev state is not observed. The angular distribution of inelastic deuterons corresponding to the 1.982-Mev state of is obtained and comparison of the absolute cross section with theory provides an estimate of the deformation. Proton groups from reactions are observed corresponding to excitations of 0, 1.469, 3.164, 3.948, (4.123), (4.586), (4.706), (5.165), 5.45, 5.707, and 6.279 Mev, where assignment of the levels in parentheses to is uncertain. The known 0.096-Mev state is not observed and the proton group corresponding to 5.45-Mev excitation contains contributions from at least two states. Angular distributions leading to the ground, 1.469-, 3.164-, 3.948-, 5.707-, and 6.279-Mev states are obtained and reduced widths extracted. The values for these angular distributions are ambiguous except for the ground-state reaction () and the 1.469-Mev state reaction (). Analysis of the data suggests that and . Using parameter values estimated from the energy level spectrum or obtained from neighboring nuclei, a description of this nucleus in terms of the strong-coupling unified model agrees with the data.
- Received 21 November 1960
DOI:https://doi.org/10.1103/PhysRev.122.150
©1961 American Physical Society