Structural evolution in $A\approx 100$ nuclei within the mapped interacting boson model based on the Gogny energy density functional

Abstract

The structure of even-even neutron-rich Ru, Mo, Zr and Sr nuclei in the $A\approx 100$ mass region is studied within the interacting boson model (IBM) with microscopic input from the self-consistent mean-field approximation based on the Gogny-D1M energy density functional. The deformation energy surface in the quadrupole deformation space $(\beta ,\gamma )$, computed within the constrained Hartree-Fock-Bogoliubov framework, is mapped onto the expectation value of the appropriately chosen IBM Hamiltonian with configuration mixing in the boson condensate state. The mapped IBM Hamiltonian is used to study the spectroscopic properties of ${}^{98-114}$Ru, ${}^{96-112}$Mo, ${}^{94-110}$Zr and ${}^{92-108}$Sr. Several cases of $\gamma$-soft behavior are predicted in Ru and Mo nuclei while a pronounced coexistence between strongly-prolate and weakly-oblate deformed shapes is found for Zr and Sr nuclei. The method describes well the evolution of experimental yrast and non-yrast states as well as selected $B$(E2) transition probabilities.

20 pages, 23 figures, 1 table; To be published in Phys. Rev. C

References in corpus (8)

• Microscopic Formulation of Interacting Boson Model for Rotational Nuclei
• Structure of Krypton isotopes calculated with symmetry conserving configuration mixing methods
• Spectroscopy of quadrupole and octupole states in rare-earth nuclei from a Gogny force
• Beta-decay properties of neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes from deformed quasiparticle random-phase approximation
• Systematics of one-quasiparticle configurations in neutron-rich Sr, Zr, and Mo odd isotopes with the Gogny energy density functional
• Triaxiality in the interacting boson model
• Shape coexistence in Lead isotopes in the interacting boson model with Gogny energy density functional
• Ground state octupole correlation energies with effective forces

Cited by in corpus (3)

• Intertwined Quantum Phase Transitions in the Zr Isotopes
• Evidence for coexisting shapes in ${}^{98}$Zr through lifetime measurements
• Structure of krypton isotopes within the interacting boson model derived from the Gogny energy density functional