Structure and decay modes of antisymmetric beta vibrations in the O(6) limit of the neutron-proton interacting boson model.

Abstract

We investigate the structure of the intrinsic states for the symmetric and antisymmetric {beta} vibrations in the O(6) limit of the neutron-proton interacting boson model and of the low-lying configurations projected from these intrinsic states. We study the decay modes of these low-lying states, particularly the antisymmetric 0{sup +} state. This level appears to decay only to the 1{sup +} and 2{sup +} mixed-symmetry states. The signature for these decays is that the {ital M}1 and {ital E}2 strengths go to zero for {ital N}{sub {pi}}={ital N}{sub {nu}}.