n-p Interaction in Odd-Odd Nuclei and Odd-A Nuclei
- Received Date: 1998-12-09
- Accepted Date: 1900-01-01
- Available Online: 2000-02-05
Abstract: 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 ε1p-1n of odd-odd nuclei was compared with half of the average value of the last proton-dineutron interaction energy ε1p-2n in odd-Z nuclei and the last diproton neutron interaction energy ε2p-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 ε1p-2n in odd-Z nuclei is generally approximate to ε2p-1n in odd-N nuclei with the same mass number A, which is equivalent to the Garvey-Kelson mass relation.