Abstract
The ionization kinetics of a transient nonequilibrium highly charged ion plasma are investigated in the average-ion approximation. Approximations of a hydrogenic ion, whose energy levels depend either on the principal quantum number alone or on the principal and orbital angular momentum quantum numbers, are considered as atom models. The results of calculations of various plasma characteristics performed within this model are presented, and a comparison with previously published data, as well as with calculations in the chemical-bond approximation, is performed. It is shown that the average-ion model satisfactorily describes the spectral characteristics of a nonideal plasma.
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