Electron impact ionization of tungsten ions in statistical model
A. V. Demura+*, M. B. Kadomtsev+, V. S. Lisitsa+*×, V. A. Shurygin+
+National Research Centre "Kurchatov institute", 123182 Moscow, Russia
*National Research Nuclear University MEPhI, 115409 Moscow, Russia
× Moscow Institute of Physics and Technology (State University), 141700 Dolgoprudny, Russia
Abstract
The statistical model for calculations of the electron impact ionization cross sections of
multielectron ions is developed for the first time. The model is based on the idea of collective
excitations of atomic electrons with the local plasma frequency, while the Thomas-Fermi model is
used for atomic electrons density distribution. The electron impact ionization cross sections and
related ionization rates of tungsten ions from W+ up to W63+ are calculated and then compared with
the vast collection of modern experimental and modeling results. The reasonable correspondence
between experimental and theoretical data demonstrates the universal nature of statistical approach
to the description of atomic processes in multielectron systems.