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High-K States in the Odd-Odd Nuclide Re-180

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 Re-180 Physical Review C, 72 (5).


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The structure of the deformed, doubly odd nuclide Re-180 has been studied by gamma-ray and conversion-electron spectroscopy using the Yb-174(B-11,5n) reaction with a pulsed 71 MeV beam of B-11 ions. Several of the previously known intrinsic states have been given revised spin and parity assignments. Rotational bands are observed with K-pi=(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 mu s 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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
El-Masri, H M
Walker, P
Dracoulis, G D
Kibedi, T
Byrne, A P
Bruce, A M
Orce, J N
Emmanouilidis, A
Cullen, D M
Wheldon, C
Xu, F R
Date : 1 January 2005
DOI : 10.1103/PhysRevC.72.054306
Additional Information : Published in <i>Physical Review C,</i> Vol. 72, Iss. 5. Copyright 2005 American Physical Society. Click <a href=>here</a> to access the journal's website.
Depositing User : Mr Adam Field
Date Deposited : 27 May 2010 14:08
Last Modified : 16 Jan 2019 16:19

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