Triaxial shape fluctuations and quasiparticle excitations in heavy nuclei

Abstract

The deformation parameters beta and gamma together with the two-quasiparticle excitations are taken into account, for the first time, as coordinates within a symmetry conserving (angular momentum and particle number) generator coordinate method. The simultaneous consideration of collective as well as single particle degrees of freedom allows us to describe soft and rigid nuclei as well as the transition region in between. We apply the new theory to the study of the spectra and transition probabilities of the 156-172Er isotopes with a Pairing plus Quadrupole residual interaction. Good agreement with the experimental results is obtained for most of the observables studied and with the same quality for the very soft and the strongly deformed nuclei.

14 pages, 11 figures, accepted for publication in Phys. Rev. C

References in corpus (3)

• Beyond the relativistic mean-field approximation (III): collective Hamiltonian in five dimensions
• Configuration mixing of angular-momentum and particle-number projected triaxial HFB states using the Skyrme energy density functional
• Symmetry conserving configuration mixing method with cranked states

Cited by in corpus (6)

• Chiral geometry in symmetry restored states: Chiral doublet bands in 128Cs
• The time-dependent generator coordinate method in nuclear physics
• Triaxial rigidity of ${}^{166}$Er and its Bohr-model realization
• The union of rotational and vibrational modes in generator-coordinate-type calculations, with application to neutrinoless double-beta decay
• Extended triaxial projected shell model approach for odd-neutron nuclei
• Prolate-to-oblate transition and backbending along the yrast line induced by quasiparticle alignment