High-K states in the odd-odd nuclide 180Re
El-Masri, H.M., Walker, P.M., Dracoulis, G.D., Kibedi, T., Byrne, A.P., Bruce, A.M., Orce, J.N., Emmanouilidis, A., Cullen, D.M., Wheldon, C. and Xu, F.R. (2005) High-K states in the odd-odd nuclide 180Re Physical Review C, 72 (5). ISSN 0556-2813
Official URL: http://prc.aps.org/abstract/PRC/v72/i5/e054306
The structure of the deformed, doubly odd nuclide 180Re has been studied by gamma-ray and conversion-electron spectroscopy using the 174Yb(11B,5n) reaction with a pulsed 71 MeV beam of 11B ions. Several of the previously known intrinsic states have been given revised spin and parity assignments. Rotational bands are observed with Kpi=(4+),(5-),(7+),8+,9-,13+,14-,15-,16+,21-, and (22+). Among these, a four-quasiparticle t band is identified, which is already energetically favored at its bandhead compared to the corresponding two-quasiparticle band; and two six-quasiparticle bands are identified and associated with a tau=13 µs isomer. The observed structures, including g factors and alignments, are interpreted with the aid of Nilsson-plus-BCS calculations and configuration-constrained potential energy surface calculations. Reduced-hindrance values are obtained for K-forbidden transitions, illustrating the important role of the K quantum number for near-yrast isomers.
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