par Laghdas, K.;Reid, Robert Henderson G;Joachain, Charles ;Burke, Philip P.G.
Référence Journal of Physics. B, Atomic Molecular and Optical Physics, 32, 6, page (1439-1450)
Publication Publié, 1999-03
Article révisé par les pairs
Résumé : We have calculated total and single differential cross sections for electron impact ionization of Ne6+ (1s22s2 1S) using a method that combines the distorted-wave Born approximation for the incident/scattered electron with an R-matrix treatment of the Ne6+ system. Our calculation included eight states of the final Ne7+ ion, namely 1s22s 2S, 1s22p 2P0 and six states with the configuration 1s2l2l′, and up to the 24-pole component of the interaction between the ionizing electron and the target. The single differential cross sections exhibit considerable structure due to autoionizing resonances, including a large resonance due to the quasi-bound state Ne6+ (1s2s22p1P0). In the calculation of the total cross section, a modification to the usual half-range approximation is proposed, which ensures that the contributions from autoionizing resonances have the correct thresholds. Our theoretical results for the total cross section are in good agreement with the experimental results.