【摘要】 基于轴对称形变约束的相对论平均场理论,考虑微观质心修正,计算了Zr同位素链偶偶核的位能曲面,并利用Strutinsky壳修正方法从相应的单粒子能级中提取了壳修正能量,研究了Zr同位素链的壳结构变化.结果表明,形变约束的相对论平均场理论能很好地描述Zr同位素链的基态性质.Zr同位素链壳修正能量显示出明显的壳效应,随中子数变化有较强的同位旋依赖性;同时,Zr同位素链壳修正能量具有复杂的形变依赖性,对稳定形变原子核的形成有重要的作用.更多还原

【Abstract】 The potential energy surfaces of even-even Zr isotopes are calculated with the axially deformed constrained relativistic mean-field(RMF) theory by taking the microscopic center-of-mass correction energy into account.The shell correction energy is extracted from the corresponding single-particle spectra with the Strutinsky method and used to study the evolution of shell structure in Zr isotopes.It is found that the ground state properties of Zr isotopes can be well reproduced in the constrained RMF calculation.By analysing the shell correction energy,significant shell effects with strong isospin dependence are illustrated.In addition,the shell correction energy also strongly depends on the deformation,which plays an important role in the formation of stable deformed nuclei.更多还原