Pair fluctuations in nonideal plasma and their restriction at the ionization threshold

A self-consistent fluctuation approach is developed to the consideration of the spectral region intermediate between discrete and continuous levels of energy in nonideal plasma. Pair fluctuations are identified within the classical method of molecular dynamics. The transition of pair fluctuations in the limit of low degrees of nonideality of plasma to excited atoms is considered. The domains of existence of excited atoms and pair fluctuations are estimated. The pattern of restraint of statistical sum of atom in nonideal plasma is clarified.