Advanced Relativistic Energy Approach in Electron-Collisional and Radiative Spectroscopy of Ions in Plasmas

Abstract

AbstractAn advanced relativistic approach to studying spectroscopic characteristics of the multicharged ions in plasmas is presented. The approach is based on the generalized relativistic energy approach combined with the optimized relativistic many-body perturbation theory with the Dirac-Debye shielding model as zeroth approximation, adapted for application to study of the spectral parameters of ions in plasmas. An electronic Hamiltonian for N-electron ion in plasmas is added by the Yukawa-type electron-electron and nuclear interaction potential. The transition probabilities and lifetimes for different excited states in spectrum of the Li-like calcium are computed within the consistent relativistic many-body approach for different values of the plasmas screening parameter (correspondingly, electron density and temperature) and compared with available alternative data. The results of relativistic calculation (taking into account the exchange and correlation corrections) of the electron collision cross-sections (strengths) of excitation of the transition between the fine-structure levels (2P3/2 − 2P1/2) of the ground state of F-like ions with Z = 19–26 and of the [2s2 1S − (2s2p 1P)] transition in the B-like O4+ are presented and analyzed.KeywordsElectron-collisional processesΜulticharged ionsRelativistic energy approachDebye plasmas