Abstract
Shell model calculations have been performed for low-excitation states in the Zr isotopes between and with an emphasis on the factors and electromagnetic decay rates for the lowest and states. Overall the states are reasonably well described. In contrast, the states present a puzzle because the measured factors imply a single-particle configuration whereas the experimental transition rates imply collective structures that cannot be explained by shell model calculations. A consistent description of the states in and is sought in terms of coupling between the single-particle structure and a collective octupole vibration.
- Received 15 December 2003
DOI:https://doi.org/10.1103/PhysRevC.69.044302
©2004 American Physical Society