Absolute cross sections and kinetic energy release distributions for electron impact ionization and dissociation of CDn+ (n=1-4)
(2014) Atomic and Plasma-Material Interaction Data for Fusion — Vol. 16, n° 1, p. 45-55 (2014)
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- Authors
Defrance, Pierre 
- Abstract
- Absolute cross-sections for electron impact dissociative excitation and ionization of CDn+ (n=1-4) leading to the formation of ionic products (CDn2+ , D+, D2+ , C+, CD+, CD2+, CD3+) are reported in the energy range from their respective thresholds to 2.5 keV. The animated crossed-beams method is used. Around the maximum, all these cross-sections are found to range from 3×10-17 cm2 to 20×10-17 cm2, except for CDn2+ and D2+, which are lower than 1.7×10-17 cm2. Kinetic energy release distributions are deduced from the analysis of ionic product velocity distributions, which are obtained for each ionic fragment, at selected electron energies. KERDs are seen to extend from 0 to a maximum of 13 eV both for both for the light and the heavy ion fragments. The comparison of the present energy thresholds and kinetic energy release with available published data allows the identification of initial or intermediate states contributing to the observed processes. Individual contributions for dissociative excitation and dissociative ionization are determined for each singly-charged product, which are of significant interest in fusion plasma edge modelling and diagnostics. A complete database including cross-sections and energies is compiled for dissociative excitation and ionization of CDn+ ions with n= 1–4, for use in fusion application.
- Affiliations
Macedonian Academy of Sciences and Arts Institute für Plasmaphysik
Citations
Defrance, P., Lecointre, J., & Janev, R. K. (2014). Absolute cross sections and kinetic energy release distributions for electron impact ionization and dissociation of CDn+ (n=1-4). Atomic and Plasma-Material Interaction Data for Fusion, 16(1), 45-55. https://hdl.handle.net/2078.5/97792 (Original work published 2014)