The neutron-rich nucleus^(22)C,located at the neutron drip line,exhibits intriguing structural properties,such as its Borromean nature and potential two-neutron halo configuration.Despite experimental advancements,unc...The neutron-rich nucleus^(22)C,located at the neutron drip line,exhibits intriguing structural properties,such as its Borromean nature and potential two-neutron halo configuration.Despite experimental advancements,uncertainties persist in the two-neutron separation energy S_(2n)and the radius of matter for this attractive nucleus^(22)C.In this study,we employed the three-body Faddeev approach to investigate the ground-state properties of ^(22)C,constrained by the recently deduced matter radius.By optimizing the neutron-core and three-body interactions to reproduce the experimental radius,the two-neutron separation energy S_(2n) was redetermined,revealing a weakly bound system dominated by the s-wave configuration.Additionally,an excited state exhibiting an Efimov-like pattern was identified by analyzing the specific density distributions and relative distances in the three-body system,highlighting the geometric similarity between the ground and excited states.展开更多
基金supported by the National Natural Science Foundation of China(Nos.12075121 and 12375122)the Natural Science Foundation of Jiangsu Province(No.BK20190067)the Fundamental Research Funds for the Central Universities(Nos.30922010312 and B230201022)。
文摘The neutron-rich nucleus^(22)C,located at the neutron drip line,exhibits intriguing structural properties,such as its Borromean nature and potential two-neutron halo configuration.Despite experimental advancements,uncertainties persist in the two-neutron separation energy S_(2n)and the radius of matter for this attractive nucleus^(22)C.In this study,we employed the three-body Faddeev approach to investigate the ground-state properties of ^(22)C,constrained by the recently deduced matter radius.By optimizing the neutron-core and three-body interactions to reproduce the experimental radius,the two-neutron separation energy S_(2n) was redetermined,revealing a weakly bound system dominated by the s-wave configuration.Additionally,an excited state exhibiting an Efimov-like pattern was identified by analyzing the specific density distributions and relative distances in the three-body system,highlighting the geometric similarity between the ground and excited states.
