#pragma keywords XAFS.ORG XAFS EXAFS XANES XAS xafs exafs xanes xas x-ray
#pragma description XAFS x-ray absorption fine-structure.
#acl Known:read All:read

XAFS.ORG is a community site for x-ray absorption fine-structure (XAFS) and related spectroscopies.


=== XAFS, EXAFS, and XANES ===
XAFS is a spectroscopic technique that uses x-rays to probe the physical  and chemical structure of matter at an atomic scale.  XAFS is element-specific,  in that x-rays are chosen to be at and above the binding energy of a particular core electronic level of a particular atomic species. Because all but the lightest  elements have core-level binding energies in the x-ray regime, nearly all elements can be studied with XAFS.  The emphasis has traditionally been on the heavier elements (of Z>15 or so).

An energy-tunable x-ray source is needed to measure XAFS, which typically means a [[http://www-als.lbl.gov/als/synchrotron_sources.html|synchrotron]] is used. Unlike diffraction-based techniques for studying atomic structure of matter, XAFS does not require a crystalline samples.

More information about XAFS can be found on the pages here, and at:

 * [[http://www.ixasportal.net|New Web Portal for the International X-ray Absorption Society]]
 * [[http://www.iucr.org|International Union of Crystallography]]
 * [[http://scon155.phys.msu.su/~papers/|XAFS Publication Database]]

=== About this site ===
XAFS.ORG is a [[http://wiki.org/wiki.cgi?WhatIsWiki|Wiki]], which is to  say that the content of this web site can be edited and extended by anyone.

For more information about how to use this wiki, see:

 . [ HowToUseThisWiki  |  HelpForBeginners  | HelpContents ]