Beyond-mean-field study of _Λ~(37)Ar based on the Skyrme-Hartree-Fock model
Beyond-mean-field study of _Λ~(37)Ar based on the Skyrme-Hartree-Fock model
复制标题
基于Skyrme-Hartree-Fock模型的_δ~(37)Ar超平均场研究
DOI：
10.1088/1674-1137/ac6357
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zhou Xianrong
中科院分区：
文献类型：
--
作者：
Cui Jiwei;Wang Ruizhe;Zhou Xianrong
我们提出了使用 Skyrme-Hartree-Fock (SHF) 模型和超平均场方法获得的 _Λ~(37)Ar 的超核态，包括角动量投影 (AMP) 和发生器坐标法 (GCM)。给出了全面的能谱，其中包括具有正宇称或负宇称的正常变形（ND）和超变形（SD）超核态。讨论了对应于 Λ 超子占据 s-、p-或 sd-壳层轨道的构型的能级。对于s壳Λ，我们特别关注对应于~(36)Ar~N⊗s_Λ和~(36)Ar~S⊗s_Λ构型的ND和SD状态，其中~(36)Ar~N和~(36)Ar~S分别表示ND和SD核核。回顾以往研究中不同模型对 SD 态分离能的分歧。对于 p 壳层，预测了四个旋转能带，并显示了杂质效应。此外，在~(36)Ar+Λ的分离阈值以下0.5 MeV内获得了对应于构型~(36)Ar~S⊗Λ[101]3/2~-和~(36)Ar~S⊗Λ[101]1/2~-的两个能级。对于 sd-shell Λ，在分离阈值附近发现了三个束缚态，并讨论了这些状态背后的机制。
We present the hypernuclear states of _Λ~(37)Ar obtained using the Skyrme-Hartree-Fock (SHF) model and a beyond-mean-field approach, including angular momentum projection (AMP) and the generator coordinate method (GCM). A comprehensive energy spectrum is given, which includes normally deformed (ND) and super deformed (SD) hypernuclear states with positive or negative parities. Energy levels corresponding to the configurations in which a Λ hyperon occupies the s-, p-, or sd-shell orbitals are discussed. For the s-shell Λ, we pay special attention to the ND and SD states corresponding to the configurations ~(36)Ar~N⊗s_Λ and ~(36)Ar~S⊗s_Λ, where ~(36)Ar~N and ~(36)Ar~S denote the ND and SD nuclear cores, respectively. The disagreements between different models over the separation energy of the SD state in previous studies are revisited. For the p-shell, four rotational bands are predicted, and the impurity effects are shown. Furthermore, two energy levels corresponding to the configurations ~(36)Ar~S⊗Λ[101]3/2~-and ~(36)Ar~S⊗Λ[101]1/2~- are obtained below the separation threshold of ~(36)Ar+Λ within 0.5 MeV. For the sd-shell Λ, three bound states are found near the separation threshold, and the mechanism behind these states are discussed.