G. H. Bhat

Triaxial projected shell model study of γ-vibrational bands in even-even Er isotopes

We expand the triaxial projected shell model basis to include triaxially deformed multi-quasiparticle states. This allows us to study the yrast and \ensuremath{\gamma}-vibrational bands up to high spins for both \ensuremath{\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 \ensuremath{\gamma} 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-\ensuremath{\gamma} phonons where current data are still sparse. It is observed that \ensuremath{\gamma} bands for neutron-deficient isotopes of

Triaxial projected shell model study of chiral rotation in odd-odd nuclei

^{156}\mathrm{Er}

Multi-quasiparticle γ-band structure in neutron-deficient Ce and Nd isotopes

and

Exploring the Origin of Nearly Degenerate Doublet Bands in Ag 106

^{158}\mathrm{Er}

Multi-phonon γ-vibrational bands in odd-mass nuclei studied by triaxial projected shell model approach

are close to the yrast band, and further these bands are predicted to be nearly degenerate for high-spin states.

Nature of

Abstract Chiral rotation observed in 128 Cs is studied using the newly developed microscopic triaxial projected shell model (TPSM) approach. The observed energy levels and the electromagnetic transition probabilities of the nearly degenerate chiral dipole bands in this isotope are well reproduced by the present model. This demonstrates the broad applicability of the TPSM approach, based on a schematic interaction and angular-momentum projection technique, to explain a variety of low- and high-spin phenomena in triaxial rotating nuclei.

\gamma

Abstract The newly developed multi-quasiparticle triaxial projected shell model approach is employed to study the high-spin band structures in neutron-deficient even–even Ce- and Nd-isotopes. It is observed that γ -bands are built on each intrinsic configuration of the triaxial mean-field deformation. Due to the fact that a triaxial configuration is a superposition of several K -states, the projection from these states results in several low-lying bands originating from the same intrinsic configuration. This generalizes the well-known concept of the surface γ -oscillation in deformed nuclei based on the ground-state to γ -bands built on multi-quasiparticle configurations. This new feature provides an alternative explanation on the observation of two I = 10 aligning states in 134 Ce and both exhibiting a neutron character.

-deformation in Ge and Se nuclei and the triaxial projected shell model description

The lifetimes of the excited levels for the two nearly degenerate bands of

Microscopic nuclear structure models and methods: chiral symmetry, wobbling motion and γ–bands

^{106}\mathrm{Ag}

Investigation of doublet-bands in 124,126,130,132Cs odd–odd nuclei using triaxial projected shell model approach

have been measured using the Doppler-shift attenuation method. The deduced