J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas 66506-2604, USA.
Phys Rev Lett. 2010 Jun 25;104(25):253201. doi: 10.1103/PhysRevLett.104.253201. Epub 2010 Jun 21.
Based on the full quantal recollision model and field-free electron impact ionization theory, we calculate the correlated momentum spectra of the two outgoing electrons in strong field nonsequential double ionization (NSDI) of helium to compare with recent experiments. By analyzing the relative strength of binary versus recoil collisions exhibited in the photoelectron spectra, we confirm that the observed fingerlike structure in the experiment is a consequence of the Coulomb interaction between the two emitted electrons. Our result supports the recollision mechanism of strong field NSDI at the most fundamental level.
基于全量子再碰撞模型和无场电子碰撞离化理论，我们计算了氦的强场非顺序双电离（NSDI）中两个出射电子的关联动量谱，以与最近的实验进行比较。通过分析光电谱中双体碰撞与反冲碰撞的相对强度，我们证实了实验中观察到的指状结构是两个发射电子之间的库仑相互作用的结果。我们的结果在最基本的层面上支持强场 NSDI 的再碰撞机制。
