Triaxiality in the interacting boson model

Abstract

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.

Accepted for publication in Nuclear Physics A

References in corpus (2)

• Partial Dynamical Symmetry in Deformed Nuclei
• IBM-1 description of the fission products ${}^{108,110,112}$Ru

Cited by in corpus (12)

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• The IBM Description of the B(E2) Anomaly: Dynamical Triaxiality and Configuration Mixing
• B(E2) anomaly and triaxial deformation within a two-fluid SU(3) symmetry
• Nuclear Structure Properties and Stellar Weak Rates for 76Se: Unblocking of the Gamow Teller Strength
• Algebraic description of the triaxially to axially rotational shape phase transition
• Boson Models with Interactions of Arbitrary Order
• Probing Quadruple Deformation in Transitional Nuclei via Angular Momentum Projection