Ultrafast Relaxation of MLCT Excited States in Manganese Tricarbonyl Complexes: Insights from Polarization-Resolved Femtosecond X-ray Absorption Spectroscopy at the Mn and Br K-Edges - Christopher J. Otolski; Ryan M. Lamb; Wade C. Henke; Leland B. Gee; Daniel R. Johnson; Ryan D. Ribson; Takahiro Sato; Sanghoon Song; James D. Blakemore; Gilles Doumy; Anne Marie March; James E. Penner-Hahn; et al. (Journal of the American Chemical Society, 2026)