Abstract
The first information obtained on excited states of the N=50 isotone populated in the β decay of neutron-rich is presented. The half-life was measured to be 1.85±0.06 s. Using γ singles and γγ coincidence measurements, a total of 51 γ rays were placed in a level scheme for corresponding to 28 levels in a range of excitation energy up to 4.84 MeV. The density of levels up to 2.0 MeV excitation energy is reasonably well reproduced by shell-model calculations, indicating that is probably a doubly magic nucleus. Approximately half of the β intensity to excited states in populates a group of levels above 3.5 MeV excitation energy which can be interpreted as primarily core polarization neutron particle-neutron hole states.
- Received 29 December 1987
DOI:https://doi.org/10.1103/PhysRevC.38.285
©1988 American Physical Society