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arXiv 2102.04589nucl-thnucl-ex
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$^{20}$ C中两个与两价中子相连的$^9$ Li团簇

Two $^9$Li clusters connected with two valence neutrons in $^{20}$C

Naoyuki Itagaki, Tokuro Fukui, Junki Tanaka, Yuma Kikuchi

摘要:

许多先前的工作已经表明,在$^{11}$ Li中存在由围绕$^9$ Li的弱束缚的两个中子组成的晕结构,并且当另一个$^9$ Li接近时,观察这种晕结构如何变化是有趣的。在这项研究中,我们介绍了一个四体模型的$^{20}$ C与两个$^9$锂团簇和两个价中子。反对称准团簇模型(AQCM)的发展使得从$α$团簇模型生成$jj$耦合壳模型波函数成为可能。本文将$^9$ Li的$jj$ -耦合壳模型波函数看作一个团簇,它对应于$p_{3/2}$的中子亚闭合组态,讨论了两个中子如何连接两个$^9$ Li团簇.到目前为止,在传统的模型中,大部分的集团已被限制在三维谐振子,如$^4$ He,$^{16}$ O,和$^{40}$ Ca的封闭;然而,由于AQCM,它是可行的,利用$jj$耦合壳模型波函数作为多个子系统相当容易。讨论了在四体阈能附近出现的具有团簇结构的转动带结构。

英文摘要:

Many preceding works have shown in $^{11}$Li the presence of the halo structure comprised of the weakly bound two neutrons around $^9$Li, and it is intriguing to see how this halo structure changes when another $^9$Li approaches. In this study, we introduce a four-body model for $^{20}$C with two $^9$Li clusters and two valence neutrons. The recent development of the antisymmetrized quasi cluster model (AQCM) makes it possible to generate $jj$-coupling shell-model wave functions from $α$ cluster models. Here, $jj$-coupling shell model wave function of $^9$Li is regarded as a cluster, which corresponds to the subclosure configuration of $p_{3/2}$ for the neutrons, and we discuss how the two neutrons connect two $^9$Li clusters. Until now, most of the clusters in the conventional models have been limited to the closures of the three-dimensional harmonic oscillators, such as $^4$He, $^{16}$O, and $^{40}$Ca; however, owing to AQCM, it is feasible to utilize the $jj$-coupling shell model wave functions as plural subsystems quite easily. The appearance of a rotational band structure with a cluster structure around the four-body threshold energy is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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