Systematic analysis of \Delta I = 4 bifurcation in A~150 superdeformed nuclei: Active orbitals

Abstract

A simple criterion for the \Delta I = 4 bifurcation is applied to thirty superdeformed bands in the A~150 mass region. The analysis allows to differentiate between active and inactive for staggering single-particle states. The consideration is based on additivity of nonaxial hexadecapole moment, which plays a key role in the phenomenon.

Comments: 8 pages, Revtex (two columns), 2 figures