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

Details N=Z Waiting Point Nucleus $^{68}$Se: Collective Rotation and High-K Isomeric States N=Z Waiting Point Nucleus $^{68}$Se: Collective Rotation and High-K Isomeric States

2001-07-01

arxiv.org/abs/nucl-th/0107004v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 eps figures

Scientific paper

The structure of collective states and quasi-particle excitations in $^{68}$Se is analyzed by using the projected shell model. It is found that the $g_{9/2}$ 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 $^{68}$Se is discussed with respect to the isomers and their possible impact on the determination of its nuclear mass.

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