Triaxiality in the interacting boson model

Details Triaxiality in the interacting boson model Triaxiality in the interacting boson model

2008-05-16

arxiv.org/abs/0805.2560v1

Nucl.Phys.A808:27-46,2008

Physics

Nuclear Physics

Nuclear Theory

Accepted for publication in Nuclear Physics A

Scientific paper

10.1016/j.nuclphysa.2008.05.007

The signature splitting of the $\gamma$-vibrational band of several Ru, Pd, Xe, Ba, Os and Pt isotopes is analyzed in the framework of the interacting boson model (IBM). The nuclei studied are close to the $\gamma$-unstable SO(6) limit of the IBM and have well-known $\gamma$ bands. It is shown that in most nuclei the signature splitting is better reproduced by the inclusion of a three-body interaction between the $d$ bosons. In none of the nuclei evidence for a stable, triaxial ground-state shape is found.

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