奇奇核与奇A核n-p相互作用

n-p Interaction in Odd Odd Nuclei and Odd-A Nuclei

从结合能实验值提取n p相互作用能εip -jn,系统比较了奇奇核单质子单中子相互作用能ε1p -1n与相邻奇A核相应量的平均值 ,发现前者普遍大于后者 .提出奇奇核n p增强的解释为 ,GMshift效应和同类核子对关联对奇A核n p相互作用的削弱效应 .同时指出 ,奇质子核的ε1p -2n相当好地近似等于同质量数奇中子核的ε2p -1n,并且这与Garvey Kelson关系是等价的 .

The interaction energies of the last i proton(s) and the last j neutron(s) were obtained from nuclear mass data base. The last n p interaction energy ε 1p-1n of odd odd nuclei was compared with half of the average value of the last proton dineutron interaction energy ε 1p-2n in odd Z nuclei and the last diproton neutron interaction energy ε 2p-1n in odd N nuclei. It is found that the former is systematically greater than the latter. The enhancement of n p interaction may be attributed to the effect of pairing weakening the n p interaction in odd A nuclei as well as GM shifts. Additionally,? it is found that ε 1p-2n in odd Z nuclei is generally approximate to ε 2p-1n in odd N nuclei with the same mass number A ,? which is equivalent to the Garvey Kelson mass relation.