Inelastic scattering of broadband electron wave packets driven by an   intense mid-infrared laser field
  Intense, 100 fs laser pulses at 3.2 and 3.6 um are used to generate, by multi-photon ionization, broadband wave packets with up to 400 eV of kinetic energy and charge states up to Xe+6. The multiple ionization pathways are well described by a white electron wave packet and field-free inelastic cross sections, averaged over the intensity-dependent energy distribution for (e,ne) electron impact ionization. The analysis also suggests a contribution from a 4d core excitation in xenon. 
A. D. DiChiara, E. Sistrunk, C. I. Blaga, U. B. Szafruga, P. Agostini   and L. F. DiMauro
physics.atom-ph physics.optics