Abstract
Excited states have been identified in the very neutron-deficient nucleus. High-spin spectroscopy has been performed using the Gammasphere array, and the assignment of gamma-ray transitions to has been made in a separate experiment in which gamma rays were detected in coincidence with x rays and with recoiling evaporation residues. A previously observed sequence of five gamma rays has been extended by 11 transitions, to high spin, and has been identified as the yrast band of Two additional bands have been observed and are tentatively assigned to be based on protons in the and orbitals. Alignments of pairs of neutrons and protons are observed in all of the bands. The alignments are compared to cranked Woods-Saxon calculations, and are discussed with respect to the effects of a neutron-proton interaction. Of particular interest are the features of the alignment in the band and of the alignment in the band. The frequencies of these alignments can be qualitatively explained only if a neutron-proton interaction is taken into account.
- Received 16 September 2000
DOI:https://doi.org/10.1103/PhysRevC.63.024319
©2001 American Physical Society