Abstract
We have studied the levels of populated in the beta decay of by gamma-ray spectroscopy, which included Compton-suppression gamma-ray spectra of sources that were continuously eluted of the daughter activity using ion-exchange chromatographic techniques. The study of the gamma-ray deexcitation of the low-energy levels was completed by a measurement of the low-energy gamma-ray spectrum following thermal neutron capture on . Also, we have performed calculations using the interacting-boson-fermion-fermion model. When we compare the model predictions with the levels and their properties, which we have determined, we find better agreement than has been obtained using quasiparticle-vibrational models.
- Received 27 September 1989
DOI:https://doi.org/10.1103/PhysRevC.41.1172
©1990 American Physical Society