Abstract
For the first time a comprehensive level and decay scheme has been obtained for a nucleus in the shell by using a radioactive beam and target. Particle- and coincidences were measured following the reaction at The results do not support an inversion of the and orbitals, as previously proposed for but they do suggest an increased gap between the and orbitals due to the neutron excess. A consistent interpretation of the level scheme in terms of the shell model using the USD Hamiltonian is possible below 4 MeV, but differences increase at higher excitation energies. Another interpretation is that the influences of both the and intruder orbitals increase simultaneously with increasing T, an effect not included in the USD Hamiltonian.
- Received 14 December 2001
DOI:https://doi.org/10.1103/PhysRevC.65.051302
©2002 American Physical Society