Effects of strong rotation-particle coupling on the energy levels of two-quasiparticle systems with possible application to 184Ir and 186Ir

Abstract

The consequences of the availability of the [541↓] proton orbital in light even-mass Ir nuclei are examined. The structure of rotational bands in which the state of lowest energy is not the state of minimum angular momentum is described in terms of an effective decoupling parameter. The [541↓] assignment for the proton in the ground state configurations of 184Ir and 186Ir is seen to be plausible and the level ordering in these nuclei may be largely determined by the properties of the [541↓] orbital stemming from the j = 9 2 spherical state, while the perturbing effects of a low-Ω neutron partner ([510↑] or [512↑]) should be relatively insignificant. Other interesting consequences of this description are also discussed.