Σύγκριση μεθόδων

	XANES	EXAFS
Πεδίο	Φασματοσκοπία	Φασματοσκοπία
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1975	1971
Δημιουργός	Peter Lee	Edward Stern
Τύπος	Synchrotron technique	Synchrotron technique
Θεμελιώδης πηγή	Lee, P. A., & Pendry, J. B. (1975). Theory of extended x-ray absorption fine structure. Physical Review B, 11(8), 2795-2811.	Sayers, D. E., Stern, E. A., & Lytle, F. W. (1971). New technique for investigating noncrystalline structures: Fourier analysis of the extended X-ray absorption fine structure. Physical Review Letters, 27(18), 1204-1207.
Εναλλακτικές ονομασίες	XANES spectroscopy, near-edge X-ray absorption	EXAFS spectroscopy, X-ray absorption spectroscopy
Συναφείς	3	3
Σύνοψη	X-ray Absorption Near Edge Structure (XANES) is a synchrotron X-ray spectroscopy technique that measures the electronic and geometric structure around a specific atom by analyzing the X-ray absorption spectrum within about 50 eV of an absorption edge. Developed by Lee and Pendry in 1975, XANES is complementary to EXAFS and reveals valence state, local symmetry, and unoccupied orbital structure through near-threshold features and resonances.	Extended X-ray Absorption Fine Structure (EXAFS) is a synchrotron-based X-ray spectroscopy technique that measures the local geometric and electronic structure around a specific atom in any material, crystal or amorphous. Discovered by Sayers, Stern, and Lytle in 1971, EXAFS reveals interatomic distances, coordination numbers, and disorder in the atomic environment by analyzing oscillations in the X-ray absorption spectrum above an absorption edge.