Systematics in the structure of low-lying, nonyrast bandhead configurations of strongly deformed nuclei

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An empirical investigation of the trends in the properties of the nonyrast Kπ=2γ+ and Kπ=0 2+ bandhead configurations in nuclei that are related to one another through the addition or removal of a-particle-like structures, reveals their complex and changing behavior in contrast to the smooth behavior of the yrast states. A systematic application of the pseudo-SU(3) model for such a sequence of deformed nuclei from the rare earth region leads to an accurate and unified description of not only yrast, but nonyrast collective bands. The onset of deformation as manifested through the position of the excited bandheads in the spectra is understood and interpreted by using a realistic model Hamiltonian in conjunction with a microscopic distribution of the eigenstates across allowed proton and neutron strong-coupled SU(3) configurations.

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Physical Review C - Nuclear Physics

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