Eur. Phys. J. D 55, 557-567 (2009)
https://doi.org/10.1140/epjd/e2009-00241-3

Absolute cross-sections and kinetic-energy-release distributions for electron-impact ionization and dissociation of CD₂⁺

¹ Université Catholique de Louvain, Département de Physique, unité PAMO, Chemin du Cyclotron 2, 1348 Louvain-la-Neuve, Belgium
² Durham University, Department of Chemistry, South Road, Durham, DH1 3LE, UK
³ Belgrade University, Faculty of Physics, PO Box 386, 11000 Belgrade, Serbia
⁴ Institute of Physics, PO Box 68, 11081 Belgrade, Serbia
⁵ Institut für Plasmaphysik, Forschungszentrum Jülich Gmbh, EURATOM Association, Trilateral Euregio Cluster, 52425 Jülich, Germany
⁶ Macedonian Academy of Sciences and Arts, 1000 Skopje, Macedonia

Corresponding author: ^a pierre.defrance@uclouvain.be

Received: 16 April 2009
Revised: 16 July 2009
Published online: 4 September 2009

Abstract

Absolute cross-sections have been measured for electron-impact dissociative excitation and ionization of CD₂⁺ leading to formation of CD₂²⁺ , CD⁺, C⁺, D₂⁺ and D⁺. The animated crossed-beams method is applied in the energy range from the reaction threshold up to 2.5 keV. The maximum total cross-sections are found to be (1.2±0.1)×10^-17 cm², (6.1±0.7)×10^-17 cm², (6.4±0.7)×10^-17 cm², (26.3±3.8)×10^-19 cm² and (14.9±1.4)×10^-17 cm² for CD₂²⁺ , CD⁺, C⁺, D₂⁺ and D⁺ respectively. 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. Conforming to the scheme recently applied in the CD₄⁺ and in the CD₃⁺ articles, the cross-sections are presented in closed analytic forms convenient for implementation in plasma simulation codes. Kinetic-energy-release distributions are determined for each ionic fragment at selected electron energies.