Radiation emission in electron-tungsten ions collisions: Polarization vs static channels

The detailed comparison between static (frozen core) and polarization radiation emission channel in electron-tungsten ions collisions is presented. Both Bremsstrahlung and radiative recombination spectra are calculated for different ion charges ^Zi and electron energies E. The consideration is based on quasiclassical approach using statistical (Thomas-Fermi) and local plasma frequency models for ion cores as well as rotational approximation for emission spectra. The frequency and energy domains where polarization channel is comparable or even dominates over static one are determined. The results are of interest for modern magnetic fusion investigations of plasmas with tungsten impurity.