Extended triaxial projected shell model approach for odd-neutron nuclei

Abstract

In an effort to elucidate the rich band structures observed in odd-neutron systems, triaxial projected shell model approach is extended to include three-quasineutron and five-quasiparticle configurations. This extension makes it possible to investigate the high-spin states up to and including the second band crossing. Detailed investigation has been performed for odd-mass Xe isotopes with the extended basis, and it is shown that character of the band crossing along the yrast line changes with shell filling of the 1h11/2 orbital. Further, it is observed that the three-quasiparticle state that crosses the ground-state configuration, leading to the normal band crossing phenomenon along the yrast line, first crosses the γ band based on the ground-state configuration at an earlier spin value. This crossing feature explains the occurrence of the signature inversion observed in the γ bands for some of the studied isotopes.

References in corpus (14)

• Particle-Number Projection and the Density Functional Theory
• Beyond Mean-Field Calculations for Odd-A Nuclei
• First Measurement of Collectivity of Coexisting Shapes based on Type II Shell Evolution: The Case of ${}^{96}$Zr
• Triaxial projected shell model study of gamma-vibrational bands in even-even Er isotopes
• Toward extremes of angular momentum: Application of the Pfaffian algorithm in realistic calculations
• Ground-state properties of even and odd Magnesium isotopes in a symmetry-conserving approach
• Triaxial shape fluctuations and quasiparticle excitations in heavy nuclei
• Quasiparticle and $\gamma$-band structures in ${}^{156}$Dy
• Observation of $\gamma$-vibrations and alignments built on non-ground-state configurations in 156Dy
• Quadrupole Collective Dynamics from Energy Density Functionals: Collective Hamiltonian and the Interacting Boson Model
• Systematic study of near yrast band structures in odd-mass ${}^{125-137}$Pr and ${}^{127-139}$Pm isotopes
• Interplay between pairing and triaxial shape degrees of freedom in Os and Pt nuclei
• Effective shell model Hamiltonians from density functional theory: quadrupolar and pairing correlations
• High-Spin Doublet Band Structures in odd-odd ${}^{194-200}$Tl isotopes