中文摘要：

在全相对论理论框架下,利用多组态Dirac-Fock（MCDF）方法,系统计算了NⅡ离子2p4f—2p3d的辐射跃迁概率,得到的结果与已有实验值符合很好.具体计算中,详细分析了相对论效应、电子关联、弛豫效应、Breit相互作用和量子电动力学（QED）效应对能级精细结构及辐射跃迁概率的影响.结果表明：相对论效应、电子关联和弛豫效应对NⅡ2p4f-2p3d辐射跃迁概率有很重要的影响,考虑了这些效应后计算值得到明显改善.

英文摘要：

On the basis of full relativistic theory, transition probabilities of 2p4f--2p3d for N Ⅱ have been calculated using multi- configuration Dirac-Fock method. The results are well consistent with experimental value. In the present work, the influence of relativistic effects, electron correlation, relaxation effects, Breit interaction and quantum electrodynamic effects on fine structure and transition probabi.lities are investigated in detail. The results show that the relativistic effects, electron correlation and relaxation effects are important to the calculations of energy structure and transition probabilities.