A systematic study of shapes in Ni (Z = 28) isotopes has been made in the Relativistic–Hartree–Bogoliubov (RHB) formalism with two types of density-dependent NN interactions which are based on the range of meson-exchange. The constraint calculations assuming the axial and triaxial-symmetry predict the shape isomerism in the case of 56,64,66,68,70,80Ni isotopes. Significant jumps at N = 28, 40, 50 in the binding energy per nucleon (BE/A) and in the S2n correspond to the neutron shell closure, and 56,68,78Ni as doubly magic nuclei. The present calculation supports the recently reported calculations using the non-relativistic Hartree–Fock (HF) Skyrme SIII [1] interaction predicting the importance of tensor parameter in order to reproduce the experimental findings of the proton level crossing at N = 46. The results obtained are in agreement with experiment and with other theoretical studies.

中文翻译：

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Ni同位素的形状异构和魔力

镍中形状的系统研究(Z = 28)同位素已在相对论-Hartree-Bogoliubov (RHB) 形式中产生，具有两种基于介子交换范围的密度相关 NN 相互作用。假设轴向和三轴对称的约束计算预测了在以下情况下的形状异构56,64,66,68,70,80你同位素。大幅跃升ñ = 28, 40, 50每个核子的结合能 (BE/A) 和小号2n对应于中子壳闭合，并且56,68,78你作为双重魔核。本计算支持最近报道的使用非相对论 Hartree-Fock (HF) Skyrme SIII [1] 相互作用预测张量参数的重要性的计算，以重现质子水平交叉的实验结果ñ = 46. 所得结果与实验和其他理论研究一致。