Evidence for Shape Co-existence at medium spin in 76Rb

Authors :: Wadsworth, R.
Ragnarsson, I.
Carlsson, B. G.
Ma, Hai-Liang
Davies, P. J.
Andreoiu, C.
Austin, R. A. E.
Carpenter, M. P.
Dashdorj, D.
Freeman, S. J.
Garrett, P. E.
Greene, J.
Görgen, A.
Jenkins, D. G.
Johnston-Theasby, F.
Joshi, P.
Macchiavelli, A. O.
Moore, F.
Mukherjee, G.
Reviol, W.
Sarantites, D. G.
Seweryniak, D.
Svensson, C. E.
Valiente-Dobón, J. J.
Publication Year :: 2011
Abstract: Four previously known rotational bands in 76Rb have been extended to moderate spins using the Gammasphere and Microball gamma ray and charged particle detector arrays and the 40Ca(40Ca,3pn) reaction at a beam energy of 165 MeV. The properties of two of the negative-parity bands can only readily be interpreted in terms of the highly successful Cranked Nilsson-Strutinsky model calculations if they have the same configuration in terms of the number of g9/2 particles, but they result from different nuclear shapes (one near-oblate and the other near-prolate). These data appear to constitute a unique example of shape co-existing structures at medium spins.<br />Comment: Accepted for publication in Physics Letters B