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Keywords:

  • atomic data;
  • line: profiles;
  • opacity;
  • plasmas;
  • radiative transfer

ABSTRACT

Stark width experimental and theoretical data of neutral helium spectral lines have been used to demonstrate their dependence on the upper-level ionization potential within different spectral series. The emphasis is on the term describing structure influence on the studied Stark-width dependences. After establishing these dependences, predictions were made for electron, proton and ionized helium impact contributions to the Stark widths of neutral helium spectral lines that have not been measured experimentally or calculated theoretically until now (transitions from high levels of He i). The accuracy of the data obtained is comparable with the accuracies of the experimental and theoretical values used in establishing the dependences.