Shape Coexistence and Mixing in 152Sm

Details Shape Coexistence and Mixing in 152Sm Shape Coexistence and Mixing in 152Sm

2007-06-28

arxiv.org/abs/0706.4129v2

Physics

Nuclear Physics

Nuclear Experiment

8 single-spaced, single-column pages, 4 figures, 1 table. Submitted to Physical Review Letters

Scientific paper

Experimental studies of 152Sm using multiple-step Coulomb excitation and inelastic neutron scattering provide key data that clarify the low-energy collective structure of this nucleus. No candidates for two-phonon beta-vibrational states are found. Experimental level energies of the ground-state and first excited (0+ state) rotational bands, electric monopole transition rates, reduced quadrupole transition rates, and the isomer shift of the first excited 2+ state are all described within ~10% precision using two-band mixing calculations. The basic collective structure of 152Sm is described using strong mixing of near-degenerate coexisting quasi-rotational bands with different deformations.

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