电子关联效应对Ar^(6+)离子电子碰撞激发截面和Stokes参数的影响

The influence of electron correlative effects on electron impact excitation cross sections and Stokes parameters of Ar6+ ion

利用全相对论扭曲波方法,系统计算了Ar6+离子基态3s2 1S0到激发态3s3p 1P1的电子碰撞激发截面和Stokes参数,详细研究了电子关联效应的影响.结果表明:低能碰撞时,小散射角范围内电子关联效应对微分截面和Stokes参数的影响很大;高能碰撞时,整个散射角内对它们的影响较小;此外,我们的计算结果与已有的实验和理论结果比较,发现在大角散射处它们具有较好的一致性,小角散射处不同理论结果之间存在较大偏差,需要进一步的实验验证.

The electron impact excitation（EIE） cross sections and Stokes parameters from the 3s21S0 ground state to the excited state 3s3p1P1 of Ar6＋ ion have been calculated systematically by using the fully relativistic distorted-wave（RDW） model.The influences of electron correlative effects on them have been studied.It is found that,for low-energy collision,the contributions from electron correlative effects are very large on both of cross sections and Stokes parameters in small scatting angle region;however,for high-energy collision,the contributions from electron correlative effects are small in the whole scatting angle region;in addition,the present calculations are compared with the available experimental and theoretical results,the agreements are obtained in large scattering angle region,but the difference still exists between theoretical results in small scattering angle region,which need to be examined by experiment.