X-ray absorption fine structure spectroscopy near-edge X-ray absorption fine structure spectroscopy near edge X-ray absorption spectroscopy XANES spectroscopy X-ray absorption near edge structure spectrometry XANES XANES spectrometry NEXAF spectroscopy X-ray absorption spectroscopy where changes in the X-ray absorption coefficient measured within 40 eV of the absorption edge (the part of the spectrum where the incident X-ray energy matches the binding energy of an electron) are determined as a function of incident X-ray energy. X-ray absorption near-edge structure NEXAFS X-ray absorption near edge structure (XANES) spectroscopy CHMO:0000305 NEXAFSS X-ray absorption near edge structure spectroscopy NEXAFS spectrometry near-edge X-ray absorption fine structure spectrometry