Tensor correlations in He4 and Be8 within an antisymmetrized quasicluster model
Tensor correlations in He4 and Be8 within an antisymmetrized quasicluster model
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DOI：
10.1103/physrevc.98.054306
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发表时间：
2018-05
影响因子：
3.1
通讯作者：
H. Matsuno;Y. Kanada-En’yo;N. Itagaki
中科院分区：
文献类型：
--
作者：
H. Matsuno;Y. Kanada-En’yo;N. Itagaki
在本文中，我们扩展了改进的简化方法的框架以考虑张量贡献($I$SMT)，并提出了张量形式的反对称准团簇模型(AQCM-T)。虽然AQCM-T是唯象的，但我们可以用一种非常简单的方式来处理由张量相互作用引起的类氘核$T=0$$NN$对中的$^3S$-$^3d$耦合，这使得我们可以继续到更重的原子核。我们还提出了一种新的有效相互作用V2M，其中Volkov 2号相互作用的三重偶通道被削弱到60%，以便在计入现实相互作用的张量项后重现4$He的结合能。使用AQCM-T和新的相互作用，给出了在$^4$He中的显著张量贡献，这几乎与中心相互作用相当，其中$D$态与主要的$S$态混合了8%。具有新交互作用的AQCM-T模型也适用于$^8$BE。结果表明，张量抑制对两个{α}团簇之间的短程斥力有显著的贡献。
In this paper, we extend the framework of improved version of simplified method to take into account the tensor contribution ($i$SMT) and propose AQCM-T, tensor version of antisymmetrized quasi cluster model (AQCM). Although AQCM-T is phenomenological, we can treat the $^3S$-$^3D$ coupling in the deuteron-like $T=0$ $NN$-pair induced by the tensor interaction in a very simplified way, which allows us to proceed to heavier nuclei. Also we propose a new effective interaction, V2m, where the triplet-even channel of the Volkov No.2 interaction is weakened to 60% so as to reproduce the binding energy of $^4$He after including the tensor term of a realistic interaction. Using AQCM-T and the new interaction, the significant tensor contribution in $^4$He is shown, which is almost comparable the central interaction, where $D$-state mixes by 8% to the major $S$-state. The AQCM-T model with the new interaction is also applied to $^8$Be. It is found that the tensor suppression gives significant contribution to the short-range repulsion between two {\alpha} clusters.