INCLUSION OF INDIVIDUAL STATES OF IONS IN THE MODIFIED HARTREE-FOCK-SLATER MODEL

The density-functional method is used to derive equations for describi ng effectively the state of separate ions in plasma. The equations are self-consistent and make it possible to use the average-atom model fo r describing the remaining states, which are not taken into account in dividually. Both a simple substance and mixture of elements are studie d. The equilibrium conditions obtained in such a model require that th e electron pressures in the atomic cells be equal for separate ions of all components of the mixture.