Fully Relativistic Electron Impact Excitation Cross-Section and Polarization for Tungsten Ions

Abstract

Electron impact excitation of highly charged tungsten ions in the framework of a fully relativistic distorted wave approach is considered in this paper. Calculations of electron impact excitation cross-sections for the M- and L-shell transitions in the tungsten ions Wn+ (n = 44–66) and polarization of the decay of photons from the excited tungsten ions are briefly reviewed and discussed. New calculations in the wide range of incident electron energies are presented for M-shell transitions in the K-like through Ne-like tungsten ions.

Keywords

• Electron-impact excitation
• highly charged tungsten ions
• relativistic distorted wave
• polarization