关联效应对氖原子电子碰撞激发过程的影响

Influence of electron correlation effects on electron impact excitation of Neon atom

利用全相对论扭曲波方法,系统研究了各种碰撞能量时中性Ne原子基态2p6 1S0及亚稳态2p53s3P2到2p53l(l=s,p,d)精细能级的电子碰撞激发过程,并分析了电子关联效应对靶态能级、辐射跃迁几率及其电子碰撞激发截面的影响.结果表明,电子关联效应对低能区的碰撞激发截面的影响尤其显著,靶态计算中考虑更多来自高激发态的电子关联后,会导致低能区的碰撞激发截面降低,并在一定程度上消除了与实验测量结果的偏差.对于2p53s和2p53p激发态,本文在关联模型B下的计算结果与以往的实验和理论符合的比较好.但是,对于2p53d激发态,不同理论结果之间存在较大偏差需要实验和理论研究进一步检验.

In this paper ,electron impact excitation （EIE） process from the ground state 2p6 1S0 and the metastate 2p53s 3 P2 to 2p53l（l= s ,p ,d） excitated states of neutral Ne atom is studied systematically by using a relativity distorted wave method . The focus is mainly paid on the influence of electron correlation on target energy levels , transition rates and electron impact excitation cross sections . It is found that the electron correlation effect is especially significant for EIE cross section of neutral Ne atom in lower energy collision regions , it will largely reduce the cross sections when more consideration of the electron correlation from higher excited configurations is taken in calculation of target states . Comparison is made between the present results in correlation model B with earlier theoretical and experimental results available ,a generally good agreement is found for 2p53s and 2p53p excited states . However ,for 2p53d excited states , there are absent experimental results to compare , larger deviation between different theoretical results need further experimental and theoretical study to verify .