Journal
PHYSICAL REVIEW C
Volume 77, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.77.034313
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We expand the triaxial projected shell model basis to include triaxially deformed multi-quasiparticle states. This allows us to study the yrast and gamma-vibrational bands up to high spins for both gamma-soft and well-deformed nuclei. As a first application, a systematic study of the high-spin states in Er isotopes is performed. The calculated yrast and. bands are compared with the known experimental data, and it is shown that the agreement between theory and experiment is quite satisfactory. The calculation leads to predictions for bands based on one- and two-gamma phonons where current data are still sparse. It is observed that gamma bands for neutron-deficient isotopes of Er-156 and Er-158 are close to the yrast band, and further these bands are predicted to be nearly degenerate for high-spin states.
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