张量力驱动的Jahn-Teller效应和奇异Si同位素的形状转变
Tensor-force-driven Jahn-Teller effect and shape transitions in exotic Si isotopes
摘要：
我们展示了如何中子丰富的外来Si和S同位素的形状演变可以被理解为一个Jahn-Teller效应，部分来自张量驱动的单粒子能量的演变。我们提出的详细计算与已知的实验数据非常吻合，我们指出了新的功能，应该在新的实验中探索。势能面用于理解形状演变。子壳层封闭核，$^{42}$ Si，被证明是一个完美的例子，强烈的扁球形，而不是通过一个强大的Jahn-Teller机制。由$^{48}$ Ca（e，e 'p）实验测量的光谱因子的分布被证明是很好的描述，提供了一个独特的测试张量驱动的壳演化。
英文摘要：
We show how the shape evolution of the neutron-rich exotic Si and S isotopes can be understood as a Jahn-Teller effect that comes in part from the tensor-driven evolution of single-particle energies. The detailed calculations we present are in excellent agreement with known experimental data, and we point out of new features that should be explored in new experiments. Potential energy surfaces are used to understand the shape evolutions. The sub-shell closed nucleus, $^{42}$Si, is shown to be a perfect example of a strongly oblate shape instead of a sphere through a robust Jahn-Teller mechanism. The distribution of spectroscopic factors measured by $^{48}$Ca(e,e'p) experiment is shown to be well described, providing a unique test on the tensor-driven shell evolution.
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