anomalous diffraction

异常绕射

Atmospheric Sciences (English-Chinese) dictionary. 2014.

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  • Anomalous X-ray scattering — AXRS or XRAS is a technique within X ray diffraction that makes use of the anomalous dispersion that occurs when a wavelength is selected that is in the vicinity of an absorption edge of one of the constituent elements of the sample.Atomic… …   Wikipedia

  • Multi-wavelength anomalous dispersion — Multi wavelength anomalous diffraction (sometimes Multi wavelength anomalous dispersion; abbreviated MAD) is a technique used in X ray crystallography that facilitates the determination of the three dimensional structure of biological… …   Wikipedia

  • Powder diffraction — is a scientific technique using X ray, neutron, or electron diffraction on powder or microcrystalline samples for structural characterization of materials. [B.D. Cullity Elements of X ray Diffraction Addison Wesley Mass. 1978] Explanation Ideally …   Wikipedia

  • Dynamical theory of diffraction — The dynamical theory of diffraction describes the interaction of waves with a regular lattice. The wave fields traditionally described are X rays, neutrons or electrons and the regular lattice, atomic crystal structures or nanometer scaled multi… …   Wikipedia

  • Multiple isomorphous replacement — or MIR is the most common approach of solving the phase problem in X ray crystallography. This method is conducted by soaking the crystal of a sample to be analyzed with a heavy atom solution or co crystallization with the heavy atom. The… …   Wikipedia

  • X-ray crystallography — can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… …   Wikipedia

  • Détermination d'une structure cristalline — La détermination d une structure cristalline consiste, de manière générale, à déterminer, pour un cristal de structure inconnue, les paramètres de sa maille conventionnelle, son réseau de Bravais, son groupe d espace et la position des atomes… …   Wikipédia en Français

  • Phase problem — The phase problem is the name given to the problem of loss of information (the phase) from a physical measurement. The name itself comes from the field of x ray crystallography, where the phase problem has to be solved for the determination of a… …   Wikipedia

  • Резонанс Фано — тип резонанса с асимметричным профилем, возникающего в результате интерференции двух волновых процессов. Природа интерферирующих процессов может быть самой различной, поэтому такой резонанс носит универсальный характер и появляется в различных… …   Википедия

  • Mie scattering — Monostatic radar cross section [RCS] of a perfectly conducting metal sphere as a function of frequency (calculated by Mie theory). In the low frequency Rayleigh scattering limit where the circumference is less than the wavelength, the normalized… …   Wikipedia

  • Wayne Hendrickson — Wayne Arthur Hendrickson (* 25. April 1945 in Spring Valley (Wisconsin))[1] ist ein US amerikanischer Biophysiker. Hendrickson wuchs auf einer Farm in Wisconsin auf und studierte Physik und Biologie an der University of Wisconsin (River Falls) Er …   Deutsch Wikipedia

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