Lack of additivity in mass-190 superdeformed bands

Abstract

We investigate the independent quasiparticle picture for superdeformed nuclei of the mass-190 region, which is expected to lead to additivity in certain physical quantities. Obvious deviations from additivity are found from both experimental data and projected shell model calculations. The cause of the deviation can be decomposed and identified through this model. Our study suggests that the independent quasiparticle picture may not be fully appropriate for this mass region. {copyright} {ital 1998} {ital The American Physical Society}