N=Z Waiting Point Nucleus 68Se: Collective Rotation and High-K Isomeric States

Yang Sun, Zhanwen Ma, Ani Aprahamian, Michael Wiescher

Submitted on 1 July 2001


The structure of collective states and quasi-particle excitations in 68Se is analyzed by using the projected shell model. It is found that the g9/2 orbitals play a decisive role for the structure of this nucleus. At the prolate minimum, alignment of the low-K states causes the observed first backbending in moment of inertia and we predict a second backbending that has not yet been reported. At the oblate minimum, quasi-particles having high-K can form long-lived isomeric states. The structure of 68Se is discussed with respect to the isomers and their possible impact on the determination of its nuclear mass.


Comment: 4 pages, 3 eps figures

Subjects: Nuclear Theory; Astrophysics; Nuclear Experiment