The role of shell evolution in shape coexistence
The role of shell evolution in shape coexistence
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DOI：
10.1088/0954-3899/43/2/024009
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
T. Otsuka;Y. Tsunoda
中科院分区：
文献类型：
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作者：
T. Otsuka;Y. Tsunoda
我们首先回顾了核力驱动的奇异核中的壳层演化。然后，我们证明了在描述形状共存时，有效核子-核子相互作用中张量和中心分量的平衡所起的潜在机制是至关重要的。这种效应称为II型壳层演化，而通过一系列同位素或同位素的壳层演化称为I型壳层演化。我们以Ni核为例，较为详细地描述了II型壳层演化。我们介绍了裂变动力学如何与II型壳演化在其初始阶段所触发的增强形变有关。推测稳定岛可能与这一机制的抑制有关。
We first review the shell evolution in exotic nuclei driven by nuclear forces. We then demonstrate that the underlying mechanism played by the balance of the tensor and central components in the effective nucleon–nucleon interaction is crucial when describing shape coexistence. This effect will be referred to as type II shell evolution, while the shell evolution passing through a series of isotopes or isotones is denoted as type I. We describe type II shell evolution in some detail for the case of the Ni nucleus as an example. We present how the fission dynamics can be related to enhanced deformation triggered by type II shell evolution, at its initial stage. It is suggested that the island of stability may be related to the suppression of this mechanism.