Impurity effects of the Λ hyperon in the hypernuclear systems _Λ~(25)Mg and _Λ~(29)Si
Impurity effects of the Λ hyperon in the hypernuclear systems _Λ~(25)Mg and _Λ~(29)Si
复制标题
超核系统_δ~(25)Mg 和_δ~(29)Si 中δ超子的杂质效应
DOI：
10.1088/1572-9494/ac06bd
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发表时间：
2021
影响因子：
3.1
通讯作者：
Zhou Xianrong
中科院分区：
文献类型：
--
作者：
Cui Jiwei;Zhou Xianrong
基于超平均场Skyrme-Hartree-Fock模型，分别研究了超核系统_Λ~（25）Mg和_Λ~（29）Si中Λ超子的杂质效应，重点讨论了Λ超子占据单粒子轨道Λ[000]1/2~+2，Λ[110]1/2~-，Λ [101]3/2~-和Λ[101]1/2~-的四种情况，在每种情况下，利用势能面和投影到一定角动量上的能量曲线，研究了Λ超子对核的影响，发现除了Λ超子占据s_Λ轨道引起的收缩效应外，Λ超子在p_Λ轨道上的作用，即Λ[110]1/2~-，还驱动核向扁长形方向运动，而位于另外两个p_Λ轨道上的转动带，即Λ[101]3/2~-和Λ[101]1/2~-，则驱动核芯向扁圆形移动，给出了转动带的能谱和相应的带内E2跃迁率，作为对未来实验的预测。
Based on the beyond-mean-field Skyrme-Hartree-Fock model,impurity effects of the Λ hyperon in the hypernuclear systems _Λ~(25)Mg and _Λ~(29)Si are investigated,respectively.Four cases,in which the Λ hyperon occupies the single-particle orbitals Λ[000]1/2~+2,Λ[110]1/2~-,Λ[101]3/2~-and Λ[101]1/2~-,are focused.In each case,the potential energy surface and the energy curves projected on certain angular momenta are employed to show the influence of the Λ hyperon on the nuclear core.Beside the shrinkage effect that is induced by the Λ hyperon occupying the s_Λ orbital,it is found that the Λ hyperon on the p_Λ orbital,Λ[110]1/2~-,drives the nuclear core toward a prolate shape,while the ones on the other two p_Λ orbitals,Λ[101]3/2~-and Λ[101]1/2~-,drive the nuclear core toward an oblate shape.The energy spectra and the corresponding intra-band E2 transition rates for the rotational bands are given as a prediction for future experiments.