A model for ionization balance and L-shell spectroscopy of non-LTE plasmas.

Computer Science

Scientific paper

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Atomic Processes:Plasma, Line Intensities:Plasma, Plasma:Atomic Processes, Plasma:Line Intensities

Scientific paper

The author has developed a model for calculating ionic charge-state distribution and level populations in steady-state non-local thermal equilibrium (non-LTE) plasmas. He uses this model to normalize the relative populations for a single ionization stage so that he can compute spectral line intensities as functions of electron temperature and density. These relative populations are determined by the balance of three processes: collisional excitation, de-excitation, and radiative spontaneous emission. As an application of the model, the author has computed spectral-line intensities for all the Δn = 0 transitions of nitrogen-, oxygen- and fluorine-like argon ions, and he has used these results to analyze recent experiments.

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