J. Phys. Colloques
Volume 50, Numéro C1, Janvier 1989International Conference on the Physics of Multiply Charged Ions and International Workshop on E.C.R. Ion Sources
|Page(s)||C1-399 - C1-403|
J. Phys. Colloques 50 (1989) C1-399-C1-403
THRESHOLD IONISATION BY ELECTRON IMPACTH. LEBIUS, B.A. HUBER, H.R. KOSLOWSKI and K. WIESEMANN
Institut für Experimentalphysik AG II, Ruhr-Universität, D-4630 Bochum, F.R.G.
Multiple ionisation of rare gas atoms by electron impact has been studied experimentally close to the ionisation thresholds. In this energy range the cross sections are described by threshold laws, yielding resonable agreement with theory for He and Ne. In the heavier targets the exponent value is found to be smaller than predicted and the results can be interpreted in terms of a pure statistical theory.