Abstract
This paper introduces a theoretical approach for the calculations of spectral line broadening in plasmas. As an example, the line profiles of Stark broadening or are calculated and investigated with this approach under some interesting plasma conditions. In our calculations, Dirac R-matrix methods are used to calculate electron-impact broadening operators, which are assumed to be diagonal matrix to simplify. The standard (Hooper) theory is chosen to calculate the electric microfield distribution function. Furthermore, the population density (bm) of ionization state m is obtained by the Boltzmann–Saha equations. The dipole matrix and the required atomic structure data are calculated by the atomic structure GRASP package. Thus Stark-broadened line profiles of the Lyman spectral lines in He II ion are computed in a systematic manner. These spectral line-broadening parameters are considerably important for plasma spectroscopy and plasma diagnosis as well as a key stone in plasma modeling.
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