Roles of tensor and pairing correlations on halo formation in {sup 11}Li
Roles of tensor and pairing correlations on halo formation in {sup 11}Li
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DOI：
10.1103/physrevc.76.024305
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发表时间：
2007-06
影响因子：
3.1
通讯作者：
T. Myo;K. Katō;H. Toki;K. Ikeda
中科院分区：
文献类型：
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作者：
T. Myo;K. Katō;H. Toki;K. Ikeda
我们使用扩展的 {sup 9}Li+n+n 模型研究了张量和配对相关性对 {sup 11}Li 晕形成的作用。我们首先通过使用具有变分尺寸参数的高斯函数采用 2p-2h 状态来完全考虑张量相关性，从而在壳模型基础上求解 {sup 9}Li 的基态。在 {sup 11}Li 中，{sup 9}Li 中的张量和配对相关性被另外两个中子泡利阻挡，这两个中子协同工作，使包含 0p{sub 1/2} 态的构型向上推并接近包含 1s{sub 1/2} 态的构型。因此，配对相互作用有效地将两种构型等量混合并在{sup 11}Li中形成晕结构。对于{sup 10}Li，s态和p态的反转现象在同一框架中再现。我们的模型还解释了最近观察到的 {sup 11}Li 的库仑破裂强度和电荷半径。
We studied the roles of the tensor and pairing correlations on the halo formation in {sup 11}Li with an extended {sup 9}Li+n+n model. We first solved the ground state of {sup 9}Li in the shell-model basis by taking 2p-2h states using the Gaussian functions with variational size parameters to take into account the tensor correlation fully. In {sup 11}Li, the tensor and pairing correlations in {sup 9}Li are Pauli blocked by additional two neutrons, which work coherently to make the configurations containing the 0p{sub 1/2}-state pushed up and close to those containing the 1s{sub 1/2}-state. Hence, the pairing interaction works efficiently to mix the two configurations by equal amount and develop the halo structure in {sup 11}Li. For {sup 10}Li, the inversion phenomenon of s- and p-states is reproduced in the same framework. Our model furthermore explains the recently observed Coulomb breakup strength and charge radius for {sup 11}Li.