Shell evolution in nuclei investigated with large-scale shell-model calculations

我们利用基于壳层模型的大规模核结构计算，为阐明不稳定原子核中壳层结构演化的机制做出了很大贡献。特别地，我们构建了一个描述中子数N， 28周围不稳定核结构的框架，并提出了一个名为“张量力驱动的Jahn-Teller效应”的新图景来解释N=28幻数消失的原因。此外，我们还揭示了N=28以上的不稳定原子核的壳层结构。我们还极大地改进了蒙特卡罗壳模型方法，使非常大规模的壳模型计算成为可能。

We have made a large contribution to clarifying the mechanism that causes the evolution of shell structure in unstable nuclei, using large-scale nuclear-structure calculations based on the shell model. In particular, we have constructed a framework that describes the structure of unstable nuclei around neutron number, denoted N, 28, and proposed a new picture named “tensor-force driven Jahn-Teller effect” to account for the origin of the disappearance of the N=28 magic number. Furthermore, we have revealed the shell structure of unstable nuclei beyond N=28. We have also greatly advanced the Monte Carlo shell-model method to enable very large-scale shell-model calculations.