Variable time lag and backward ejection in full-dimensional analysis of strong-field double ionization.

@article{Haan2006VariableTL,
  title={Variable time lag and backward ejection in full-dimensional analysis of strong-field double ionization.},
  author={S. L. Haan and Lawrence Breen and Alex Karim and J. H. Eberly},
  journal={Physical review letters},
  year={2006},
  volume={97 10},
  pages={103008}
}
Ensembles of 400,000 two-electron trajectories in three space dimensions are used with Newtonian equations of motion to track atomic double ionization under very strong laser fields. We report a variable time lag between e-e collision and double ionization, and find that the time lag plays a key role in the emergence directions of the electrons. These are precursors to production of electron momentum distributions showing substantial new agreement with experimental data. 

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