Journal
PHYSICAL REVIEW C
Volume 85, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.85.054309
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Funding
- U.S. DOE [DE-FG-02-91ER-40608]
- JSPS
- NSFC [11175252]
- GUCAS
- [217368]
- Grants-in-Aid for Scientific Research [20105003, 23244049] Funding Source: KAKEN
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We investigate the shape phase transition in even-even Gd-64 and Dy-66 isotopes within the proton-neutron interacting boson model (IBM-2). The parameters of the IBM-2 Hamiltonian are fixed in two different ways: the usual phenomenological fitting calculation and the mapping of the constrained self-consistent mean-field calculation with a Skyrme energy density functional onto the appropriate boson system. Notable differences are found between the energy surfaces for the phenomenological and the mapped IBM-2. Key quantities for the collective structural evolution, including level energies, B(E2) values, quadrupole moments, and the two-neutron separation energies, are analyzed in comparison to the experimental data. We show that the transition in these quantities occurs rapidly with the neutron number in the IBM-2 phenomenology but is somewhat smeared out in the mapped IBM-2. The differences in the measurable quantities are consistent with what is suggested by the energy-surface analysis.
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