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The time-dependent perturbation theory was applied to the description of the L-shell ionization of atoms by heavy-charged particles in the independent-particle model approximation. A second order correction factor to cross sections calculated in a first order theory was derived considering transitions at an average impact parameter and with minimum energy transfer as dominant ionization processes in low-velocity collisions. Numerical calculations were performed for light and heavy ion impact ionization of gold in the energy range 0. 15-2. 0 Mev/u. The results are in satisfactory agreement with the experimental data for the L//3-to-L//2 and L//1-to-L//2 subshell ionization cross section ratios. The model seems to account also for the anomalous behavior of the L//3-subshell alignment observed recently at heavy-ion impact.

Original languageEnglish
Pages (from-to)296-302
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume232 (B4)
Issue number2
Publication statusPublished - Jan 1 2005
EventInn Shell Ioniz by Light Ions, Proc of the 3rd Workshop - Linz, Austria
Duration: Aug 4 1983Aug 5 1983


ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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