title: Momentum distributions of ne(n+) ions created by an intense ultrashort laser pulse
abstract: Vector momentum distributions of Ne(n+) (n = 1,2,3) ions created by 30 fs, approximately 1 PW/cm(2) 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 Ne2+ and Ne3+ 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."
authors.affiliation: Universitat Freiburg, Hermann-Herder Strasse 3, D-79104 Freiburg, Germany.
authors.initials: R
authors.lastname: Moshammer
authors.initials: B
authors.lastname: Feuerstein
authors.initials: W
authors.lastname: Schmitt
authors.initials: A
authors.lastname: Dorn
authors.initials: CD
authors.lastname: Schroter
authors.initials: J
authors.lastname: Ullrich
authors.initials: H
authors.lastname: Rottke
authors.initials: C
authors.lastname: Trump
authors.initials: M
authors.lastname: Wittmann
authors.initials: G
authors.lastname: Korn
authors.initials: K
authors.lastname: Hoffmann
authors.initials: W
authors.lastname: Sandner