Abstract
In this paper we present a self-consistent-field calculation for energy levels of He-like ions immersed in dense and hot plasmas. Exchange and correlation energies between bound electrons are shown to be much less perturbed than the single-particle energy. Concurrently, a fully quantum-mechanical impact calculation has been made to obtain the matrix elements of the complex electron line-broadening operator ${\ensuremath{\Gamma}}_{e}$. In the special case of the principal series, it is shown that the line shifts given by the two approaches are in good agreement for typical electron temperatures and densities of laser plasmas.
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