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系统分析了奇偶核质量差公式的适用性及与能隙参数的关系．计算了核素Sn和Pb附近10个同位素链的中子奇偶质量差△n(3),发现壳效应、核子对相互作用、核的形变都会明显影响△n(3)的数值,并在此基础上,给出了一个修正的奇偶核质量差公式．
The applicability of the formula for poor parity of even and odd kernels and its relationship with energy gap parameters are analyzed systematically. The neutron parity difference △ n (3) of ten isotope chains near the Sn and Pb isotopes has been calculated. It is found that the shell effect, the nucleon pair interaction and the nuclear deformation all affect the value of △ n (3) Based on this, a modified formula for the difference between the even and odd kernels is given.