2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18996Calculations of L-shell x-ray absorption in transition metals are shown to be sensitive to screening, both of the x-ray field and the photoelectron-core hole interaction. This screening is calculated using a generalization of the time dependent local density approximation and a projection onto a local atomic basis. The approach yields renormalized dipole-matrix elements which account for the observed deviations of the L_3/L_2 branching ratio from the 2:1 value of independent electron theory.10 pages, 3 encapsulated PostScript figures (LaTeX-RevTeX4); submitted to Physical Review LettersMaterials Sciencetext