Abstract
Vector momentum distributions of ions created by 30 fs, laser pulses at 795 nm have been measured using recoil-ion momentum spectroscopy. Distinct maxima along the light polarization axis are observed at 4.0 and 7.5 a.u. for and production, respectively. Hence, mechanisms based on an instantaneous release of two (or more) electrons can be ruled out as a dominant contribution to nonsequential strong-field multiple ionization. The positions of the maxima are in accord with kinematical constraints set by the classical “rescattering model.”
- Received 24 August 1999
DOI:https://doi.org/10.1103/PhysRevLett.84.447
©2000 American Physical Society