Probing the longitudinal momentum spread of the electron wave packet at the tunnel exit
arXiv:1111.6033 · doi:10.1016/j.chemphys.2012.02.005
Abstract
We present an ellipticity resolved study of momentum distributions arising from strong-field ionization of Helium at constant intensity. The influence of the ion potential on the departing electron is considered within a semi-classical model consisting of an initial tunneling step and subsequent classical propagation. We find that the momentum distribution can be explained by the presence of a longitudinal momentum spread of the electron at the exit from the tunnel. Our combined experimental and theoretical study provides an estimate of this momentum spread.
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- Optimization of the ionization time of an atom with tailored laser pulses: a theoretical study
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