BERAKDAR, J; KLAR, H; BRAUNER, M; et al.
ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS 16, pp 91-96 (1990) (1998)A two-electron continuum wave function satisfying exact asymptotic boundary conditions (see [1]) is simplified in the high energy limit for asymmetric kinematics. The long range correlation between the fast escaping electron and the target atom in a low continuum state is properly taken into account, and corrects therefore the major shortcoming of the ordinary Born approximation. This improved Born approximation has been employed to calculate triply differential ionization cross sections at intermediate energies.
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