Open AccessRELATIVISTIC ENERGY APPROACH AND MANY-BODY PERTURBATION THEORY TO COMPUTING ELECTRON-COLLISION CROSS-SECTIONS OF COMPLEX MULTIELECTRON IONS
Author(s) -
V. V. Buyadzhi
Publication year - 2021
Publication title -
fotoèlektronika
Language(s) - English
Resource type - Journals
ISSN - 0235-2435
DOI - 10.18524/0235-2435.2020.29.225593
Subject(s) - physics , neon , perturbation theory (quantum mechanics) , electron , relativistic quantum chemistry , atomic physics , quantum electrodynamics , excitation , collision , quantum mechanics , argon , computer security , computer science
An advanced relativistic energy approach combined with a relativistic many-body perturbation theory with ab initio zeroth approximation is used to calculate the electron-collision excitation cross-sections for complex multielectron systems. The relativistic many-body perturbation theory is used alongside the gauge-invariant scheme to generate an optimal Dirac-Kohn-Sham- Debye-Hückel one-electron representation. The results of relativistic calculation (taking into account the exchange and correlation corrections) of the electron collision cross-sections of excitation for the neon-like ion of the krypton are presented and compared with alternative results calculation on the basis of the R-matrix method in the Breit-Pauli approximation, in the relativistic distorted wave approximation and R- matrix method in combination with Dirac-Fock approximation