Angular Distributions for Double Ionization of Li^- by an Ultrashort, Intense Laser Pulse

Authors

G. Lagmago Kamta, University of Nebraska - Lincoln
Anthony F. Starace, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

June 2001

Comments

Published by American Physical Society. Phys. Rev. Letters 86, 5687 (2001). http://prl.aps.org. Copyright © 2001 American Physical Society. Permission to use.

Abstract

We predict photoelectron angular distributions for double ionization of Li^- by both weak and intense ultrashort, linearly polarized laser pulses by direct numerical integration of the three-dimensional, time-dependent Schrödinger equation. Li^- is treated as a two-active electron system. Near threshold, for low intensity we recover general features of angular distributions for one-photon double ionization. For the intense field (multiphoton) case, the photoelectron angular distribution changes significantly, particularly in directions parallel and perpendicular to the laser polarization axis.