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Properties of intruder bands in the Os-Pt-Hg-Pb region

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Band mixing is used to reproduce the collective bands associated with shape coexistence in even-even osmium, platinum, mercury, and lead nuclei. The properties of the unperturbed bands are examined. The dependence of the unperturbed 2+→0+ energies of the prolate intruder bands on NπNν is similar to that of the unperturbed normal bands if the intruder configurations are assumed to involve 4-proton, 4-hole excitations. The variation is reproducible using a restricted 2-component model of interacting proton and neutron shells.

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Physical Review C - Nuclear Physics

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