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.
We systematically analyze the formula of the mass difference between the odd and even nuclei and its connection to the energy gap parameter. By calculating the mass difference of ten isotope chains near Sn and Pb, we find that all the shell structure, the pairing interaction and the nuclear deformation affect the value of △n^(3) considerably. A modified formula of mass difference is proposed.