Abstract
Excited states in the nucleus were observed for the first time using the ) reaction at 128 MeV. Identification was achieved using events detected by the Daresbury recoil separator in coincidence with rays detected in the 45 element EUROGAM I Ge-detector array. Threefold events were used to build a decay scheme which consists of two rotational bands observed to and The positive parity band in behaves similarly to a negative-parity band in and contains a region of alignment at MeV. These data, and those of can be interpreted by treating protons and neutrons separately in a cranked shell model approach despite a recent suggestion for the presence of neutron-proton pairing correlations in the neighboring self-conjugate, odd-odd ground state band. Our study suggests that some experimental observables such as the energy levels and moments of inertia, may not be able to differentiate between different pairing phases in these nuclei.
- Received 17 April 1997
DOI:https://doi.org/10.1103/PhysRevC.56.R591
©1997 American Physical Society