Fully Differential Three Dimensional Angular Distributions of Electrons Ionized in Ion- Atom Collisions

Michael Schulz, Missouri University of Science and Technology
R. Moshammer
D. Fischer
Ahmad Hasan, Missouri University of Science and Technology
N. V. Maydanyuk
J. D. Ullrich

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We compare experimental fully differential three-dimensional angular distributions of electrons ionized from He in collision with ionic projectiles covering a broad range of perturbations (0.065 to 4.4). Even at very small perturbations clear signatures of higher-order contributions are observable. At large perturbations, such contributions become even dominant, especially those involving the post-collision interaction between the outgoing projectile and the ionized electron. Our results show that single ionization is not nearly as well understood as was assumed previously. ©2004 American Institute of Physics