Speaker
Description
We report the experimental discovery of Hidden Satellites within the Mn Kα₁,₂ emission lines, with statistical significance reaching over 20 σ per data point, enabled by our in-house eXtended-Range High-Energy-Resolution Fluorescence Detection (XR-HERFD) technique at the I20-Scanning beamline (Diamond Light Source). Our new development of a binary data splicing methodology, combined with XR-HERFD, achieves approximately 50% improvements in both spectral resolution and fluorescence counts, allowing detection of subtle many-body processes previously unresolved. We have uncovered the evolutionary profile of these novel satellites, whose shake-off intensity reaches up to 20–25% of the total emission. Principal Component Analysis is applied to refine spectral features facilitating clear isolation of these many-body contributions. These findings overturn the conventional assumption of a constant many-body reduction factor (S02) in standard XAFS equation, demonstrating its strong energy dependence and advancing the fundamental understanding of core-level quantum dynamics. Our work establishes a foundation for next-generation high-resolution X-ray absorption and emission spectroscopy across physics, chemistry, and some targeted areas of biology.