Abstract

A collisional-radiative model is developed for population calculations of plasmas in non-local thermodynamic equilibrium (NLTE). Configuration-averaged rate coefficients are used in the rate equations. The cross sections are calculated based on the first perturbation theory. Wave functions required in cross-section calculations are obtained by Hatree–Fock–Slater self-consistent-field model. The kinetic model is applied to low- and high-Z plasmas. The results are compared with those of other theoretical models and experiments. Comparisons show that the present results of the mean charge state are 1-2 ionization stage lower than the experimental ones.

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