氦原子双电离相关电子动量分布中指状斑图的经典轨迹诊断
Classical Trajectory Diagnosis of Finger-Like Pattern in the Correlated Electron Momentum Distribution for Helium Double Ionization
摘要：
利用半经典准静态模型，我们确定了核库仑吸引力、终态电子排斥力和电子-场相互作用在形成氦双电离相关电子动量分布中的指状（或V形）图案中的不同作用[Phys. Rev. Lett. \textbf{99}，263002; \emph{ibid}，263003（2007）]。揭示了电子-电子碰撞后电子能量不对称分配的微观轨道结构，并分析了相应的子循环动力学。关联模式被发现是敏感的相关电子的横向动量。
英文摘要：
With a semiclassical quasistatic model we identify the distinct roles of nuclear Coulomb attraction, final state electron repulsion and electron-field interaction in forming the finger-like (or V-shaped) pattern in the correlated electron momentum distribution for Helium double ionization [Phys. Rev. Lett. \textbf{99}, 263002; \emph{ibid}, 263003 (2007)]. The underlying microscopic trajectory configurations responsible for asymmetric electron energy sharing after electron-electron collision have been uncovered and corresponding sub-cycle dynamics are analyzed. The correlation pattern is found to be sensitive to the transverse momentum of correlated electrons.
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