电子与类铍N3+和O4+离子碰撞激发截面的相对论扭曲波计算

采用全相对论扭曲波方法，系统地计算了类铍N³⁺和 O⁴⁺离子从基态到2s2p和2p² 的各激发态以及从亚稳态到2p²各激发态的电子碰撞激发截面，详细地讨论了靶态的关联效应对激发截面的影响.结果表明：对于2s-2p的单电子激发，在低能碰撞时，靶态的电子关联效应起非常重要的作用，且使得激发截面降低；而高能碰撞时，靶态波函数的描述对连续态波函数的影响比较小，对激发截面影响也比较小.对于2s²-2p²的双电子激发，其中基态2s²¹S₀到J=0的2p²³P₀，¹S₀的激发截面较大，其主要原因是末离子态波函数与基组态波函数的混合，但是其他几个激发的激发截面较小. 关键词： 全相对论扭曲波方法 电子碰撞激发 电子关联效应

Relativistic distorted-wave calculation of electron impact excitation cross sections of be-like N3+ and O4+ ions

By using a fully relativistic distorted wave method, the electron impact excitation cross sections of Be like N³⁺ and O⁴⁺ ions from the ground state 2s²¹S to 2s2p ^1,3P, 2p²³P, ¹D and ¹S 2s2p and from the metastable 2s2p ³P to 2p²³P have been calculated systematically. Meanwhile, the correlation effects of target states are also discussed. For the low energy collisions the correlation effects play a very important role, and accurate target wavefunctions are needed, but for the high energy collisions, the more correlation effects are not so important. For two electron excitations, the configuration interactions are very important and the excitations from ground state to the 2p²³P₀ and ¹S₀ have larger cross sections than the other tow electron excitations.