Effective account of exchange and correlation energetic effects in the theory of polyelectron systems

The method of account of energy effects of exchange and correlation, e.i. effects caused by energy dependence of interparticle interaction in the calculations of multielectron systems: atoms, molecules, electron gas, has been considered. The influence of the above-mentioned effects on energy characteristics of the systems is studied and it is shown that the effect in certain cases can be quite significant. Results of binding energy calculation for alkali metals (Li-Cs) are given