Program complex for problems of atomic physics. Part 3

Realization of two methods of calulations of correlation corrections in atoms: by direct summation according to multiparticle perturbation theory and by means of the Feynman diagram technique is described. Calculation in the Feynman diagram technique is more clumsy, but it possesses better numerical accuracy and permits to sum accurately dominating classes of high-order diagrams. Application of the methods is illustrates using cesium and thalium atoms. 16 refs.; 10 figs.; 5 tabs