Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-01-10
Phys.Rev.C83:054303,2011
Physics
Nuclear Physics
Nuclear Theory
7 pages, 5 figures; accepted for publication in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.83.054303
Structural evolution in neutron-rich Os and W isotopes is investigated in terms of the Interacting Boson Model (IBM) Hamiltonian determined by (constrained) Hartree-Fock-Bogoliubov (HFB) calculations with the Gogny-D1S Energy Density Functional (EDF). The interaction strengths of the IBM Hamiltonian are produced by mapping the potential energy surface (PES) of the Gogny-EDF with quadrupole degrees of freedom onto the corresponding PES of the IBM system. We examine the prolate-to-oblate shape/phase transition which is predicted to take place in this region as a function of neutron number $N$ within the considered Os and W isotopic chains. The onset of this transition is found to be more rapid compared to the neighboring Pt isotopes. The calculations also allow prediction of spectroscopic variables (excited state energies and reduced transition probabilities) which are presented for the neutron-rich $^{192,194,196}$W nuclei, for which there is only very limited experimental data available to date.
Nomura Kazumasa
Otsuka Tomohiro
Podolyák Zs.
Regan P. H.
Robledo Luis M.
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