X-ray absorption spectrum

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• Absorption spectrum — A material s absorption spectrum shows the fraction of incident electromagnetic radiation absorbed by the material over a range of frequencies. An absorption spectrum is, in a sense, the opposite of an emission spectrum.Every chemical element has …   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

• 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

• 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

• Ray tracing (graphics) — In computer graphics, ray tracing is a technique for generating an image by tracing the path of light through pixels in an image plane. The technique is capable of producing a very high degree of photorealism; usually higher than that of typical… …   Wikipedia

• X-ray Raman scattering — (XRS) is non resonant inelastic scattering of x rays from core electrons. It is analogous to Raman scattering, which is a largely used tool in optical spectroscopy, with the difference being that the wavelengths of theexciting photons fall in the …   Wikipedia

• absorption edge — noun : a clear cut long wavelength boundary of an absorption band in an X ray spectrum * * * Physics. a discontinuity in the graph of the absorption coefficient of a substance plotted against the wavelength of x rays being absorbed, representing… …   Useful english dictionary

• X-ray fluorescence — (XRF) is the emission of characteristic secondary (or fluorescent) X rays from a material that has been excited by bombarding with high energy X rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis,… …   Wikipedia

• x-ray — /eks ray /, n. Also, x ray, X ray. 1. Physics. a. Often, x rays. a form of electromagnetic radiation, similar to light but of shorter wavelength and capable of penetrating solids and of ionizing gases. b. such radiation having wavelengths in the… …   Universalium