Frustrated nonsequential double ionization: A classical model


Fully classical three-dimensional ensembles are examined under conditions of nonsequential double ionization and are shown to have trajectories in which both electrons apparently ionize only to have one electron bound to the nucleus after the laser pulse. These trajectories feature recollision excitation with subsequent over-the-barrier ionization at about the laser maximum. The “ionized” electron oscillates in the laser field but has small enough drift velocity to be recaptured at laser turnoff. Whether recapture can occur is shown to have extreme sensitivity to conditions at ionization.

Physical Review A Rapid Communications 79, 061402(R)