X-ray absorption

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• X-ray absorption fine structure — (XAFS) is a specific structure observed in X ray absorption spectroscopy (XAS). By analyzing the XAFS, information can be acquired on the local structure and on the unoccupied electronic states.The X ray absorption spectra show a steep rise at… …   Wikipedia

• Extended X-Ray Absorption Fine Structure — (EXAFS), or more simply X ray Absorption Spectroscopy (XAS), is an experimental method in physics and chemistry of determining the bonding of solids by analyzing oscillations in x ray absorption versus photon energy that are caused by… …   Wikipedia

• X-ray absorption spectroscopy — The X ray absorption spectroscopy is currently a widely used technique giving information on the local structure and on the electronic states in gas phase, molecular and condensed matter.X ray absorption spectra are obtained by tuning the photon… …   Wikipedia

• Near edge X-ray absorption fine structure — NEXAFS (Near Edge X ray Absorption Fine Structure) is an element specific electron spectroscopic technique which is highly sensitive to bond angles, bond lengths and the presence of adsorbates. It is widely used in surface science and has also… …   Wikipedia

• X-ray Absorption Near Edge Structure — XANES XANES, qui signifie X ray Absorption Near Edge Structure (soit en français Spectroscopie de structure près du front d absorption de rayons X) est une méthode d analyse spectroscopique par absorption de rayons X. Sommaire 1 Principes 2 Notes …   Wikipédia en Français

• Extended X-Ray Absorption Fine Structure — EXAFS La spectroscopie EXAFS (Extended X Ray Absorption Fine Structure) est une technique d analyse de spectrométrie d absorption des rayons X utilisant principalement le rayonnement synchrotron. Elle apporte des informations sur l environnement… …   Wikipédia en Français

• Extended X-ray absorption fine structure — EXAFS La spectroscopie EXAFS (Extended X Ray Absorption Fine Structure) est une technique d analyse de spectrométrie d absorption des rayons X utilisant principalement le rayonnement synchrotron. Elle apporte des informations sur l environnement… …   Wikipédia en Français

• extended x-ray absorption fine structure spectroscopy — abbr. EXAFS Extended x ray absorption fine structure spectroscopy, a technique used to characterize detailed structures on the surfaces of catalysts and other solids …   Petroleum refining glossary

• Ray casting — is the use of ray surface intersection tests to solve a variety of problems in computer graphics. The term was first used in computer graphics in a 1982 paper by Scott Roth to describe a method for rendering CSG models. [Citation last1 = Roth |… …   Wikipedia

• Absorption spectroscopy — An overview of electromagnetic radiation absorption. This example discusses the general principle using visible light as a specific example. A white beam source – emitting light of multiple wavelengths – is focused on a sample (the complementary… …   Wikipedia

• Absorption (electromagnetic radiation) — An overview of electromagnetic radiation absorption. This example discusses the general principle using visible light as specific example. A white beam source emitting light of multiple wavelengths is focused on a sample (the complementary color… …   Wikipedia