Effect of the electron initial longitudinal velocity on the nonsequential double-ionization process
Effect of the electron initial longitudinal velocity on the nonsequential double-ionization process
复制标题
电子初始纵向速度对非顺序双电离过程的影响
DOI：
10.1103/physreva.83.053422
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发表时间：
2011-05
影响因子：
2.9
通讯作者：
Chen, J.
中科院分区：
文献类型：
--
作者：
Hao, XiaoLei;Li, WeiDong;Liu, Jie;Chen, J.
使用半经典模型研究了第一隧道电子的初始纵向速度对非顺序双电离（NSDI）过程的影响。我们的分析表明，非零初始纵向速度以不同的方式影响NSDI过程中两种不同的典型轨迹[单回程碰撞（SRC）和多回程碰撞（MRC）]：对于SRC，相关动量分布中心部分的屈服减少；对于MRC，第一个电子的隧道时间明显延迟。与初始纵向速度为零的情况相比，在长波长范围内双电离受到抑制，并且当考虑非零初始纵向速度时，与实验观察到的电子相关分布具有更好的一致性。
The effect of initial longitudinal velocity of the first tunneling electron on the nonsequential double-ionization (NSDI) process is studied using a semiclassical model. Our analysis shows that nonzero initial longitudinal velocity affects two distinct typical trajectories [single-return collision (SRC) and multiple-return collision (MRC)] in the NSDI process in different ways: for SRC, the yield in the center part of the correlation momentum distribution is reduced; for MRC, the tunneling time of the first electron is apparently delayed. In comparison with the case of zero initial longitudinal velocity, the double ionization is suppressed for a long wavelength, and a better agreement with the experimentally observed electron correlation distribution is achieved when the nonzero initial longitudinal velocity is taken into account.