强激光场中氢分子非次序双电离电子关联性的研究  

Investigation on Electron Correlation of Nonsequential Double Ionization of Hydrogen Molecules in Strong Laser Fields

作　　者：杨培辉[1] 李超荣[1] 吴艳[1] 张自龙[2] 

机构地区：[1]浙江理工大学理学院,杭州310018 [2]上海大学理学院,上海200234

出　　处：《浙江理工大学学报（自然科学版）》2017年第4期598-603,共6页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(11247014);浙江省自然科学基金项目(LQ13A04006);浙江理工大学科研启动项目(1206832-Y)

摘　　要：采用经典系综方法对关联电子动量分布进行研究,计算结果表明:在直接碰撞电离机制下电子对的关联动量主要分布在一、三象限内,两电子出射方向相同,呈现正相关联特征,在碰撞激发电离机制下电子对的关联动量均匀分布在四个象限内;通过轨道反演分析发现,库伦斥力在碰撞激发电离机制中起主要作用。该研究为强场中氢分子电子对的重碰撞机制研究提供了简单的模型,可显示电子对的运动过程,进而揭示其关联特征。In th is p a p e r , we use th e classical en semb le me th o d to in v e s t ig a te th e co r re la ted e le c tro n momentum dist r ibut ion. The resul ts show that the cor related electron momentum of electron pair isdist ributed mainly in the fi rst and thi rd quadrants under direct collision ionization mechanism and emission direct ion of the two electrons is the same and shows posi t ive electron cor relat ion. The cor related momentum of electron pair is evenly dist ributed in the four quadrants under collision exci tat ion ionization mechanism. The t rajectory back analysis shows that the coulomb repulsion plays an impor tant collision exci tation ionization mechanism. The study provides a simple model for the recollision mechanism research of hydrogen molecule electron pair in a strong f ield, and the mot ion process of electron pair can be shown to reveal the cor relat ion characterist ics.

关 键 词：非次序双电离 重碰撞 库伦斥力 关联电子 

分 类 号：TS195.644[轻工技术与工程—纺织化学与染整工程]