The evolution of non-axial shapes and rotational structure in even–even 122–132 Ba isotopes has been investigated microscopically with the application of a triaxial projected shell model (TPSM). Based on calculations, the shape instability and softness towards γ deformation are predicted for these isotopes. In the present work, the application of three-dimensional angular-momentum projection on multi-quasiparticle configurations, constructed from the triaxially deformed mean field, provides a reliable description of the yrast and near yrast structure in these nuclei. The theoretically obtained backbends demonstrate the importance of decoupling of multi-quasiparticle states for these nuclei. The uniform behaviour of transition probabilities B( E ##IMG## [http://ej.iop.org/images/0954-3899/47/7/075103/gab81ddieqn1.gif] {${2}_{1}^{+}\to {0}_{1}^{+}$} ), shown by the present calculations, authenticate the global validity of Grodzin’s produ...

中文翻译：

---

一些双倍甚至中子缺陷钡同位素的非轴向形状的现象学描述

借助三轴投影壳模型（TPSM），对偶数甚至122-132 Ba同位素中非轴向形状和旋转结构的演化进行了微观研究。根据计算，可以预测这些同位素的形状不稳定性和对γ变形的柔软性。在当前的工作中，三维角动量投影在多准粒子构型上的应用，由三轴变形的平均场构造而成，提供了对这些核中的近端和近端结构的可靠描述。从理论上获得的弯曲表明，对于这些原子核，多准粒子状态解耦的重要性。转移概率B（E ## IMG ## [http://ej.iop.org/images/0954-3899/47/7/075103/gab81ddieqn1。