稳定核激发态的奇特结构

The unusual structure of excited state in stable nuclei

在相对论平均场理论框架下,利用壳模型方法处理对关联,研究17N和18O基态和激发态性质,计算17N和18O基态和激发态的中子和质子方均根半径,给出中子和质子的密度分布.结果表明:这些核的激发态半径比基态大,中子密度具有更大的空间分布,形成了类晕或皮的奇特结构.

In the framework of relativistic mean field theory,the shell model-like approach（SLAP） was used to treat the pairing correlations for the nuclei 17N and 18O.The properties of ground state and excited state were described.The root mean square radius in nuclear ground state and excited states and the neutron and proton density distributions were obtained.The results showed that the radius of the nuclear excited state was larger than that of the ground state,and neutron density holding a larger space distribution,forming a peculiar class of halo or skin structure.