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Title: Microscopic formulation of the interacting boson model for rotational nuclei
Authors: Nomura, Kosuke ×
Otsuka, Taka
Shimizu, Noritaka
Guo, Lu #
Issue Date: 2011
Publisher: Published for the American Physical Society by the American Institute of Physics
Series Title: Physical Review C, Nuclear Physics vol:83 issue:4
Article number: 041302(R)
Abstract: We propose a novel formulation of the interacting boson model (IBM) for rotational nuclei with axially
symmetric, strong deformation. The intrinsic structure represented by the potential-energy surface (PES) of a
given multinucleon system has a certain similarity to that of the corresponding multiboson system. Based on this
feature, one can derive an appropriate boson Hamiltonian, as already reported. This prescription, however, has a
majordifficultyintherotationalspectraofstronglydeformednuclei:thebosonicmomentofinertiaissignificantly
smaller than the corresponding nucleonic one. We present that this difficulty originates in the difference between
the rotational response of a nucleon system and that of the corresponding boson system, and could arise even
if the PESs of the two systems were identical. We further suggest that the problem can be solved by implementing
the
ˆ
L
·
ˆ
L
term into the IBM Hamiltonian, with the coupling constant derived from the cranking approach of
Skyrme mean-field models. The validity of the method is confirmed for rare-earth and actinoid nuclei, as their
experimental rotational yrast bands are reproduced nicely
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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