Buyadzhi V. Relativistic spectroscopy due to collisions in electron and ion-atom systems: Energy approach

The dissertation is devoted to the development of a new scientific direction in theoretical atomic optics and spectroscopy, in particular, relativistic spectroscopy due to collisions of electron and ion atomic systems. For the first time a new relativistic approach to the calculation of energy and spectroscopic characteristics of electron-atom-ion collision processes (including cross sections, electron-ion collision forces, velocities of collision processes, dielectronic capture, autoionization decay, and radiation) was developed. decay, oscillator forces, etc.) for atoms and multicharged ions, taking into account the influence of the plasma medium in a wide range of parameters of atoms and ions (targets) and the incident electron (including the case of slow collisions), which is based on the energy approach, S- matrix formalism of Gell-Mann and Low and relativistic multiparticle erturbation theory with Dirac-Kohn-Shem and Debye-Hückel «0» approximation using a sequential calibration-invariant rocedure for generating bases of electronic wave functions. For the first time, new procedures in the relativistic theory of electron-ion collisions have been adapted, taking into account the influence of the plasma environment, the effective consideration of multiparticle exchange-correlation effects.