Two Li clusters connected with two valence neutrons in C
Naoyuki Itagaki · Tokuro Fukui · Junki Tanaka · Yuma Kikuchi
Many preceding works have shown in Li the presence of the halo structure comprised of the weakly bound two neutrons around Li, and it is intriguing to see how this halo structure changes when another Li approaches. In this study, we introduce a four-body model for C with two Li clusters and two valence neutrons. The recent development of the antisymmetrized quasi cluster model (AQCM) makes it possible to generate -coupling shell-model wave functions from cluster models. Here, -coupling shell model wave function of Li is regarded as a cluster, which corresponds to the subclosure configuration of for the neutrons, and we discuss how the two neutrons connect two 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 He, O, and Ca; however, owing to AQCM, it is feasible to utilize the -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.