Algebraic description of the triaxially to axially rotational shape phase transition

2025/08/21 by Zhang, Yu, Liu, Yu Xin, Pan, Feng +1
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2508.15426

Abstract

Within the framework of the interacting boson model, we propose a novel algebraic scheme to describe spin-dependent structural evolutions in triaxial nuclei. Our analysis demonstrates that a triaxially to axially rotational shape phase transition can be induced by the high-order correction which is microscopically motivated by the pairing interaction on the γ-unstable rotation. This prescription is further applied to describe the structural evolutions along the yrast sequences of ¹³²Ba and ¹³⁰Xe, providing an exemplary case for demonstrating a unified explanation of both low-energy collective structures and high-spin phenomena in O(6)-like nuclei.

Citations

• Anomalous low-energy E2-related behavior in triaxial nuclei
• Nuclear shell model and interacting bosons

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