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用轴变形的相对论平均场方法,采用四极约束的方案,在四极形变的大范围内,首次计算了At的缺中子同位素链,质量数由190到207的势能面。讨论了形状共存和四极形变。我们发现,
With the relativistic mean field method of axis deformation, the scheme of quadrupole constraint was used to calculate the missing isotope chain of At from 190 to 207 in the large range of quadrupole deformation. The shape coexistence and the quadrupole deformation are discussed. we discover,