A shape coexistence interpretation of the phenomenology of alignment curves in Os and Re isotopes

Published under licence by IOP Publishing Ltd
, , Citation R A Bark 1991 J. Phys. G: Nucl. Part. Phys. 17 1209 DOI 10.1088/0954-3899/17/8/011

0954-3899/17/8/1209

Abstract

A model of shape coexistence, based on an intruder pi (h92/)2 excitation, previously applied to explain low-frequency upbending phenomena in 171Re and 172Os, is extended to heavier Os and Re isotopes. A phenomenological three-band mixing analysis of the yrast bands of even Os nuclei and the 5/2+(402) and 9/2-(514) bands of the neighbouring Re isotopes is used to deduce the excitation energies of the proposed intruder configuration as a function of neutron number. These are shown to be qualitatively consistent with an (h92/)2 excitation. The implications of this model for other nuclei are discussed.

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10.1088/0954-3899/17/8/011