Abstract

The momentum distribution of projectile electrons ejected in collisions with light targets is calculated within the second-order Born approximation for direct ionisation and within the electron impact approximation and the impulse approximation for electron capture to the target continuum. From comparison with available experimental data it is found that for forward emission angles the electron is well described by a projectile eigenstate, while at backward angles a target final state is more appropriate. At all angles the inclusion of simultaneous target excitation is very important.

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