Stark-width regularities of neutral lithium lines within different spectral series

Abstract

Stark-width dependences on the upper-level ionization potential within different spectral series of neutral lithium have been studied and discussed. Similar dependences have been found for electron- and proton-impact contributions to the Stark widths. The emphasis is on the term structure influence on the studied Stark-width dependences. The effect of series merging with increasing temperature was found. Some lines with deviations from the corresponding series dependences can be explained by the absence of close perturbing states to the transition states. After establishing these dependences, the relations found were used for Stark-width prediction of the missed lines, thus avoiding much more complicated calculation procedures. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.