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Title: Shape phase transitions in the interacting boson model: Phenomenological versus microscopic descriptions
Authors: Kotila, J
Nomura, K
Guo, L
Shimizu, N
Otsuka, Taka # ×
Issue Date: 2012
Publisher: Published for the American Physical Society by the American Institute of Physics
Series Title: Physical Review C, Nuclear Physics vol:85 issue:5
Article number: 054309
Abstract: We investigate the shape phase transition in even-even
64
Gd and
66
Dy 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
ISSN: 2469-9985
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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