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

作　　者：颉录有[1] 马玉龙[1] 董晨钟[1] 

机构地区：[1]西北师范大学物理与电子工程学院甘肃省原子分子物理与功能材料重点实验室,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2015年第3期35-42,共8页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(U1331122;U1332206;11274254;11464042)

摘　　要：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 .

关 键 词：相对论扭曲波理论 电子碰撞激发 电子关联效应 

分 类 号：O562.5[理学—原子与分子物理]