碰撞阈值下氩原子非次序双电离

张东玲; 汤清彬; 余本海; 陈东

doi:10.7498/aps.60.053205

摘要

利用三维经典系综模型研究了碰撞阈值下氩原子的非次序双电离.计算结果表明,关联电子末态纵向动量主要分布在二、四象限,且在原点附近几乎没有分布;Ar2+离子末态纵向动量谱在零动量附近呈单峰结构.上述结果与实验结果定量一致.轨迹分析表明,在碰撞阈值下,氩原子非次序双电离的微观物理机理在不同激光强度下是不相同的.当激光强度I=0.7×1014 W/cm2时,一次碰撞主导重碰撞过程.而当I=0.4×1014

关键词:

Abstract

Nonsequential double ionization (NSDI) of Ar atom below the recollision threshold is investigated using the three-dimensional classical ensembles. The calculated results reveal a dominance of events for electron emission into opposite hemispheres, a clear minimum of the correlated electron-electron momentum distributions at the origin and a single peak structure of the Ar2+ ions longitudinal momentum spectra near zero momentum. The momentum spectra of the Ar2+ ions agree with the experimental results 101 053001 (2008)] quantitatively. Trajectory back analyses show that the microscopic physical mechanisms of Ar NSDI are distinct for different intensities of the laser. When laser intensity equal to 0.7×1014 W/cm2, one recollision dominates the process of the recollision. However,the domination convert to multiple recollisions as the laser intensity decreases to 0.4×1014 W/cm2. In addition, the Coulomb attraction between the ion and electron plays an important role in microscopic dynamics of the electron in the process of Ar NSDI and eventually influences the final-state correlated electron-electron momentum distributions strongly.

Keywords:

作者及机构信息

1.
物理电子工程学院,信阳师范学院,信阳 464000

基金项目: 国家自然科学基金(批准号:11005088),河南省科技计划项目(批准号: 082300410050,102300410241),河南省高等学校青年骨干教师资助计划项目,河南省教育厅自然科学研究计划项目(批准号: 2009A140006)资助的课题.

Authors and contacts

1.
College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000 China

参考文献

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施引文献

[1]	Fittinghoff D N, Bolton P R, Chang B, Kulander K C 1992 Phys. Rev. Lett. 69 2642
[2]	Corkum P B 1993 Phys. Rev. Lett. 71 1994
[3]	Schafer K J, Young B, DiMauro L F,Kulander K C 1993 Phys. Rev. Lett. 70 1599
[4]	Liao Q, Lu P X, Lan P F, Yang Z Y, Li Y H 2008 Opt. Express 16 6455
[5]	Zhou Y M, Liao Q, Lu P X 2009 Phys. Rev. A 80 023412
[6]	Liao Q, Lu P X, Zhang Q B, Hong W Y, Yang Z Y 2008 J. Phys. B 41 125601
[7]	Zhou Y M, Liao Q, Lan P F, Lu P X 2008 Chin. Phys. Lett. 25 3950
[8]	Li H Y, Chen J, Jiang H B, Liu J, Fu P M , Gong Q H , Yan Z C ,Wang B B 2009 J. Phys. B 42 125601
[9]	Paulus G G, Grasbon F, Dreischuh A, Walther H, Kopold R, Becker W 2000 Phys. Rev. Lett. 84 3791
[10]	Liao Q, Lu P X, Lan P F, Cao W, Li Y H 2008 Phys. Rev. A 77 013408
[11]	Lan P F, Lu P X, Cao W, Wang X L 2005 Phys. Rev. E 72 016622
[12]	Cao W, Lu P X, Lan P F, Wang X L, Yang G 2007 Opt. Express 15 530
[13]	Lan P F, Lu P X, Cao W, 2007 Acta Phys. Sin. 56 2482—2487 (in Chinese) [兰鹏飞、陆培祥、曹伟 2007 物理学报 56 2482]
[14]	Cao W, Lu P X, Lan P F, Wang X L, Yang G, Li Y H 2007 Phys. Rev. A 75 063423
[15]	Lan P F, Lu P X, Cao W, Li Y H, Wang X L 2007 Phys. Rev. A 76 021801
[16]	Zhang Q B, Lan P F, Hong W Y, Liao Q, Yang Z Y, Lu P X 2009 Acta Phys. Sin. 58 4908 (in Chinese) [张庆彬、兰鹏飞、洪伟毅、廖青、杨振宇、陆培祥 2009 物理学报 58 4908]
[17]	Niikura H, Légaré F, Hasbani R, Bandrauk A D, Ivanov M Y, Villeneuve D M, Corkum P B 2002 Nature 417 917
[18]	Niikura H, Légaré F, Hasbani R, Bandrauk A D, Ivanov M Y, Villeneuve D M, Corkum P B 2003 Nature 421 826
[19]	Walker B, Sheehy B, DiMauro L F, Agostini P, Schafer K J, Kulander K C 1994 Phys. Rev. Lett. 73 1227
[20]	Liu X, Rottke H, Eremina E, Sandner W, Goulielmakis E, Keeffe K O, Lezius M, Krausz F, Lindner F, Schatzel M G, Paulus G G, Walther H 2004 Phys. Rev. Lett. 93 263001
[21]	Liao Q, Lu P X, Zhang Q B, Yang Z Y, Wang X B 2008 Opt. Express 16 17070
[22]	Liao Q, Lu P X 2009 Opt. Express 17 15550
[23]	Zhou Y M, Liao Q, Zhang Q B, Hong W Y, Lu P X 2010 Opt. Express 18 632
[24]	Tong A H, Liao Q, Zhou Y M, Lu P X 2010 Opt. Express 18 9064
[25]	Weber T, Weckenbrock M, Staudte A, Spielberger L, Jagutzki O, Mergel V, Afaneh F, Urbasch G, Vollmer M, Giessen H, Dörner R 2000 Phys. Rev. Lett. 84 443
[26]	Moshammer R, Feuerstein B, Schmitt W, Dorn A, schröter C D, Ullrich J, Rottke H, Trump C, Wittmann M, Korn G, Hoffmann K, Sandner W 2000 Phys. Rev. Lett. 84 447
[27]	Weber T, Giessen H, Weckenbrock M, Urbasch G, Staudte A, Spielberger L, Jagutzki O, Mergel V, Vollmer M, Dorner R 2000 Nature 405 658
[28]	Lein M, Gross E K U, Engel V 2000 Phys. Rev. Lett. 85 4707
[29]	Feuerstein B, Moshammer R, Fischer D, Dorn A, Schröter C D, Deipenwisch J, Crespo Lopez-Urrutia J R, Höhr C, Neumayer P, Ullrich J, Rottke H, Trump C, Wittmann M, Korn G, Sandner W 2001 Phys. Rev. Lett. 87 043003
[30]	Liu Y Q, Tschuch S, Rudenko A, Dürr M, Siegel M, Morgner U, Moshammer R, Ullrich J 2008 Phys. Rev. Lett. 101 053001
[31]	Haan S L, Van Dyke J S, Smith Z S 2008 Phys. Rev. Lett. 101 113001
[32]	Zhou Y M, Liao Q, Lu P X 2010 Opt. Express 18 16025
[33]	Tang Q B, Zhang D L, Yu B H, Chen D 2010 Acta Phys. Sin. 59 7775(in Chinese) [汤清彬、张东玲、余本海、陈东 2010 物理学报 59 7775]
[34]	Parker J S, Doherty B J S, Taylor K T, Schultz K D, Blaga C I, DiMauro L F 2006 Phys. Rev. Lett. 96 133001
[35]	Kreβ M, Loffler T, Thomson M D, Dorner R, Gimpel H, Zrost K, Ergler T, Moshammer R, Morgner U, Ullrich J, Roskos H 2006 Nature Phys. 2 327
[36]	Rudenko A, Jesus V L B, Ergler Th, Zrost K, Feuerstein B, Schröter C D, Moshammer R, Ullrich J 2007 Phys.Rev. Lett. 99 263003
[37]	Haan S L, Breen L, Karim A 2007 Opt. Express 15 767

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