Tracing transient charges in expanding clusters

  title={Tracing transient charges in expanding clusters},
  author={Bernd Schutte and Marc J. J. Vrakking and Arnaud Rouz'ee},
We study transient charges formed in methane clusters following ionization by intense nearinfrared laser pulses. Cluster ionization by 400 fs (I = 1 × 10 W/cm) pulses is highly efficient, resulting in the observation of a dominant C ion contribution. The C ion yield is very small, but is strongly enhanced by applying a time-delayed weak near-infrared pulse. We conclude that most of the valence electrons are removed from their atoms during the laser-cluster interaction, and that electrons from… 
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