In the present paper, we investigated the neutron skin properties, central depletion effects, residual and average neutron–proton interactions for Co in a Type II Supernova 1987A. The neutron skin thicknesses performed by Skyrme–Hartree–Fock model for the isotopic chain of Co \((17\le N\le 82)\) are obtained with different methods to investigate the bulk and surface contributions to neutron skin thicknesses as a function of neutron number N and relative neutron excess I = (N-Z)/A. For this purpose, two-parameter Fermi (2pF) distributions for each nucleus are obtained by the proton and neutron density distributions. Since the neutron skin thickness demonstrates the dependency on the symmetry pressure of neutron matter and sensitive to the symmetry energy at the sub-saturation density, the neutron skin properties lead to the investigation on the formation and composition of the crusts in Supernova and neutron stars. For a proper understanding of surface effects of nuclei, the central depletion (or bubble structure) effects on neutron skin of nuclei in the Supernova are explained by calculating the bubble parameters b and b^′. Furthermore, in order to illustrate accuracy of theoretical model used in the current work, the mass model approach is also analyzed by the calculating residual and average neutron–proton interactions, where the fluctuations in the mass model approaches have also been compared with the experimental and theoretical results in the literature. In order to evaluate more nuclear properties, we also analyzed the charge form factors and the single- particle energy levels for Co isotopes in the Supernova for providing nuclear data for electron-nucleus scattering experimental processes.

在本文中，我们研究了II型超新星1987A中Co的中子皮肤性质，中心耗竭效应，残留和平均中子-质子相互作用。通过Skyrme–Hartree–Fock模型对Co \（（17 \ le N \ le 82）\）的同位素链进行的中子皮厚度的获得，采用不同的方法来研究体积和表面对中子皮厚度的函数影响。中子数N和相对中子过量I  =  （NZ）/ A。为此，采用两参数费米（2 pF通过质子和中子密度分布获得每个原子核的分布。由于中子皮的厚度表现出对中子物质对称压力的依赖性，并且在亚饱和密度下对对称能量敏感，因此中子皮的性质导致人们研究了超新星和中子星中地壳的形成和组成。为了正确理解原子核的表面效应，通过计算气泡参数b和b ^'解释了超新星中核对中子皮的中心耗竭（或气泡结构）效应。。此外，为了说明当前工作中使用的理论模型的准确性，还通过计算剩余和平均中子-质子相互作用来分析质量模型方法，其中质量模型方法中的波动也与实验方法和实验方法进行了比较。文献中的理论结果。为了评估更多的核特性，我们还分析了超新星中Co同位素的电荷形式因子和单粒子能级，以为电子-核散射实验过程提供核数据。