Spectral - line shift in nonequilibrium, partially ionized plasma.

The shift of atomic spectral lines, produced by electrons and by neutral atoms in inequilibrium, partially ionized plasma is analyzed in the shock approximation. Expressions for variable width and shift, valid both in the equilibrium and nonequilibrium cases, are presented. The electron shift, with allowance for all the possible transitions from the n, m levels for alocally - equilibrium electron distribution is calculated. The shift of emission lines due to resonant dipole-dipole interaction is also calculated. It is shown that the line shift in resonant interaction is of the same order of magnitude, as its width, and should be considered in determining the line shape.