The effect of configuration interaction on relativistic transition arrays

The theory for the inclusion of configuration interaction shifts, widths an d intensity redistribution effects on relativistic transition arrays is pre sented. These effects become important when the electrostatic interaction i s strong enough, in particular for Delta n = 0 transitions. Analytic expres sions for the corrected array moments are obtained for both UTAs and STAs, bypassing the impractical need for matrix diagonalizations. Comparison of t he theoretical results with detailed calculations and with experiments are presented. (C) 2000 Elsevier Science Ltd. All rights reserved.