Probing the longitudinal momentum spread of the electron wave packet at the tunnel exit

Details Probing the longitudinal momentum spread of the electron wave packet at the tunnel exit Probing the longitudinal momentum spread of the electron wave packet at the tunnel exit

2011-11-25

arxiv.org/abs/1111.6033v2

Physics

Atomic Physics

Scientific paper

10.1016/j.chemphys.2012.02.005

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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