分子核间距对非时序双电离的影响

魏雅娜; 杨世平

doi:10.7498/aps.59.7298

摘要

利用半经典再散射模型研究了激光强度在一定范围内时分子核间距对非时序双电离过程的影响.分别计算了非时序双电离率、两电子的电离能、两电子的动量相关、Coulomb和激光场的复合势随分子核间距的变化关系.研究表明,分子核间距在1.0—6.0 a.u.范围内时,非时序双电离率和两电子动量和为零的双电离事件数随着分子核间距的增大而增大.当分子核间距继续增大(大于6.0 a.u.)时,非时序双电离率和两电子动量和为零的双电离事件数却减小.

关键词:

Abstract

Using the semiclassical rescattering model, we have studied the effect of molecular internuclear distance on non-sequential double ionization. In the process of our analysis, the non-sequential double ionization rate, two-electron ionization energy, two-electron momentum correlation and the combined potential of Coulomb field and laser field are calculated with the molecular internuclear distance changing. The results show that non-sequential double ionization rate and the double ionization events with the sum of the two electron momentums equal to zero increase with the molecular internuclear distance increasing when the molecular internuclear distance is within 1.0—6.0 a.u. When the molecular internuclear distance continues to increase (greater than 6.0 a.u.), non-sequential double ionization rate and the double ionization events with sum of two electron momentums equal to zero decrease.

Keywords:

作者及机构信息

1.
河北师范大学物理科学与信息工程学院,石家庄 050016

基金项目: 河北省自然科学基金(批准号:A2008000136)资助的课题.

Authors and contacts

1.
Department of Physics, Hebei Normal University, Shijiazhuang 050016, China

参考文献

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施引文献

[1]	Kopold R, Becker W, Kleber M 1998 Phys. Rev. A 58 4022
[2]	Gu B, Cui L, Zeng X H, Zhang F S 2006 Acta Phys. Sin. 55 2972(in Chinese)[顾斌、崔磊、曾祥华、张丰收 2006 物理学报 55 2972]
[3]	Fittinghoff D N, Bolton P R, Chang B, Kulander K C 1992 Phys. Rev. Lett. 69 2642
[4]	Walker B, Sheehy B, DiMauro L F, Agostini P, Schafer K J, Kulander K C 1994 Phys. Rev. Lett. 73 1227
[5]	Weber Th, Weckenbrock M, Staudte A, Spielberger L, Jagutzki O, Mergel V, Afaneh F, Urbasch G, Vollmer M, Giessen H, Drner R 2000 Phys. Rev. Lett. 84 443
[6]	Becker A, Faisal F H M 2000 Phys. Rev. Lett. 84 3546
[7]	Lein M, Gross E K U, Engel V 2000 Phys. Rev. Lett. 85 4707
[8]	Ye D F, Chen J, Liu J 2008 Phys. Rev. A 77 013403
[9]	Ye D F, Liu X, Liu J 2008 Phys. Rev. Lett. 101 233003
[10]	Ivanov I A, Kheifets A S 2009 Phys. Rev. A 80 063418
[11]	Chen L, Chen X M, Shao J X, Lu Y X, Ding B W, Cui Y, Gao Z M, Liu Y W, Du J, Xie J S, Sun G Z, Liu Z Y 2007 Chin. Phys. 16 2378
[12]	Leth H A, Madsen L B, McCann J F 2007 Phys. Rev. A 76 033414
[13]	Liu J, Ye D F, Chen J, Liu X 2007 Phys. Rev. Lett. 99 013003
[14]	Li H Y, Wang B B, Chen J, Jiang H B, Li X F, Liu J, Gong Q H, Yan Z C, Fu P M 2007 Phys. Rev. A 76 033405
[15]	Li Y, Chen J, Yang S P, Liu J 2007 Phys. Rev. A 76 023401
[16]	Li H Y, Wang B B, Jiang H B, Chen J, Li X F, Liu J, Gong Q H, Fu P M 2008 Acta Phys. Sin. 57 124 (in Chinese) [李洪云、王兵兵、蒋红兵、陈京、李晓峰、刘杰、龚旗煌、傅盘铭 2008 物理学报 57 124]
[17]	Saenz A 2000 Phys. Rev. A 61 051402(R)
[18]	Awasthi M, Saenz A 2006 J. Phys. B: At. Mol. Opt. Phys. 39 S389
[19]	Yu H, Zuo T, Bandrauk A D 1996 Phys. Rev. A 54 3290
[20]	Zuo T, Bandrauk A D 1995 Phys. Rev. A 52 R2511
[21]	Kamta G L, Bandrauk A D 2007 Phys. Rev. A 75 041401(R)
[22]	Kamta G L, Bandrauk A D 2005 Phys. Rev. Lett. 94 203003

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