A measurement of the cross section for electron impact ionisation of C2+
- 14 November 1978
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 11 (21) , L679-L683
- https://doi.org/10.1088/0022-3700/11/21/008
Abstract
The absolute electron impact ionisation cross section of C2+ has been measured by the crossed-beams technique for electron energies ranging from below the ionisation threshold to 1 keV. The data are in good agreement with the predictions of the semi-empirical formula of Lotz (1968), but agreement is poorer with calculations based on the binary encounter approximation (Salop (1976)) and a scaled Born approximation (McGuire (1977)). However, there is good agreement with a Coulomb-Born calculation of Moores (1978). The trapped-ion data of Hamdan et al. (1978) agree in shape, within the experimental uncertainties, but disagree in magnitude.Keywords
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