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

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

2011-06-09

arxiv.org/abs/1106.1769v1

Physics

Nuclear Physics

Nuclear Experiment

Accepted for publication in Physics Letters B

Scientific paper

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.

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