Background: The presence of nuclear ground states with stable reflection-asymmetric shapes is supported by rich experimental evidence. Theoretical surveys of odd-multipolarity deformations predict the existence of pear-shaped isotopes in several fairly localized regions of the nuclear landscape in the vicinity of near-lying single-particle shells with $\mathrm{\Delta }\ell =\mathrm{\Delta }j=3$.

中文翻译：

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反射非对称核形状的微观起源

背景：具有稳定的反射非对称形状的核基态的存在得到了丰富的实验证据的支持。奇多极性变形的理论调查预测，在靠近核的单粒子壳附近，在核景观的几个相当局部的区域中，存在梨形同位素。$\mathrm{\Delta }\ell =\mathrm{\Delta }Ĵ=3$。