RELATIVISTIC ENERGY APPROACH TO ATOMIC SYSTEMS IN A STRONG ELECTROMAGNETIC FIELD IN PLASMAS

The fundamentals of a consistent relativistic approach to determination radiation and spectral characteristics the atomic systems (atoms, multicharged ions in plasmas conditions) strong external electromagnetic field (EMF), which is based on energy formalism (REA) (adiabatic Gell-Mann Low formalism) many-body perturbation theory (RMBPT) for are presented. Within an approximation formula expresses imaginary part level shift E through QED scattering matrix, includes interaction as with EMF photon vacuum (spontaneous radiative decay). It results possibility uniform simultaneous consideration spontaneous (or) induced, processes their interference. lines position shape fully determine spectroscopy EMF. effective modified technique, Ivanova-Ivanov method differential equations, computing infinite sums expressions line shifts broadening shortly described. gauge-invariant RMBPT optimized Dirac-Kohn-Sham (DKS) Debye-Hückel zeroth approximations