Single and double ionisation of He and Ar by far H0and H-projectiles
- 14 May 1988
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 21 (9) , 1587-1602
- https://doi.org/10.1088/0953-4075/21/9/017
Abstract
Cross sections for single and double ionisation of He and Ar by impact of H0 and H- projectiles have been measured in the energy range 0.5-2 MeV. By a coincidence technique, the authors differentiated between all possible final charge states of the projectile. The total cross sections for single ionisation compare reasonably well with predictions of the free-collision model. Further, the ratio between the total double- and single-ionisation cross sections is in good agreement with predictions of the free-collision model, which is based on known cross section ratios for proton and electron impact. Thus, to a large extent, ionisation processes involving fast structured projectiles (H0 and H-) can be understood on the basis of collision properties of the constituent particles (e- and p+) of the projectile.Keywords
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