Description

Theoretical results for the A_{20} alignment parameter of L_{3} subshell are obtained for high-Z atoms bombard by light swift ions. Method of calculations employs an independent particle model with effective single-electron Dirac-Kohn-Sham operator [Y.S. Kozhedub et al, Phys. Rev. A 90, 042709 (2014)]. Solving of the single-electron equations is based on coupled-channel approach with atomic-like Dirac-Sturm-Fock orbitals, localized at the ions (atoms) [ I.I. Tupitsyn et al, Phys. Rev. A 82, 042701 (2010); Phys. Rev. A 85, 032712 (2012)]. Many-particle probabilities are calculated in terms of single-particle amplitudes employing the formalism of inclusive probabilities [H.J. Luedde and R.M. Dreizler, J. Phys. B 18, 107 (1985)]. The method of calculations takes into account the dynamics of all electrons in the system. The results of calculations are compared with available experimental and theoretical data. The role of many-particle and charge transfer effects is analyzed.