Electron Impact Excitation Cross Sections for Complex Ions. III. Highly Charged Ions with Three Valence Electrons

The electron impact collision strengths for several types of transitions 9f interest in highly charged ions with three valence electrons are expressed in a simple way in terms of scaled collision strengths for hydrogenic ions and helium4ike ions with Z = . Among applications of interest for these results are electron impact excitation of X-ray lines of lithium4ike ions observed as satellites of the lines of highly charged helium-like ions. Subject headings: atomic processes - transition probabilities