Breit interaction effect on the polarization of the Lyman- α1 x-ray line emitted by hydrogen-like ions excited by electron impact

Abstract

The relativistic convergent close-coupling (RCCC) method has been used to resolve the discrepancy between theory and experiment for the polarization of the Lyman-α1 x-ray line emitted by hydrogen-like Ti 21+, Ar17+ and Fe25+ ions excited by electron impact. We find that account of Breit relativistic corrections is important to resolve the discrepancy between experiment and theoretical calculations.