title: Different rescattering trajectories related to different total electron momenta in nonsequential double ionization.
abstract: We extend earlier work on two-electron photo-ionization to analyze electron momentum. We provide theoretical evidence distinguishing two categories of e-e trajectory associated with the correlation that develops when an "outer" electron returns to the nucleus in the presence of a high-intensity optical-wavelength laser field. We use the method of back-analysis to connect these two categories of trajectory with NSDI events having either nearly zero (Z) or substantially non-zero (NZ) total electron momentum.
authors.forename: Phay
authors.initials: P
authors.lastname: Ho
authors.forename: J
authors.initials: J
authors.lastname: Eberly