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Cosa (chi) è X-ray absorption near edge structure - definizione
X-ray absorption near edge structure
X-ray absorption near edge structure (XANES), also known as near edge X-ray absorption fine structure (NEXAFS), is a type of absorption spectroscopy that indicates the features in the X-ray absorption spectra (XAS) of condensed matter due to the photoabsorption cross section for electronic transitions from an atomic core level to final states in the energy region of 50–100 eV above the selected atomic core level ionization energy, where the wavelength of the photoelectron is larger than the interatomic distance between the absorbing atom and its first neighbour atoms.
X-ray spectroscopy
CHARACTERIZATION TECHNIQUE
Photon-in-photon-out; X-Ray Spectroscopy; X-ray spectrometry; X-ray spectra; X-Ray Absorption Edge Spectroscopy; X-Ray Absorption Fine Structure Spectroscopy; X-Ray Transmittance Spectroscopy; X-Ray Line Spectrum; X-ray spectrometer; Roentgen spectroscopy; X-ray spectrum; X-ray Spectrometry; Roentgen spectrometry; X-ray spectrograph; X-Ray Spectrometry
X-ray spectroscopy is a general term for several spectroscopic techniques for characterization of materials by using x-ray radiation.
Extended X-ray absorption fine structure
Extended X-ray absorption fine structure (EXAFS), along with X-ray absorption near edge structure (XANES), is a subset of X-ray absorption spectroscopy (XAS). Like other absorption spectroscopies, XAS techniques follow Beer's law.
