On Tuesday, January 08, 2013 12:05:41 PM sumitk@barc.gov.in wrote:

I am analyzing a Eu-L3 edge XAFS data measured in fluorescence mode. My question is regarding the appropriateness of the self absorption correction of the data. I am aware that by supplying chemical formula along with other requisite informations (angle, etc.) I can execute the self absorption correction in Athena. Also, by comparing data measured in transmission and fluorescence modes the correction can be achieved. I have only six scans of fluorescence mode measurement and by applying the correction to these scans in Athena, I have observed enhanced amplitude in mu(E) data. I am not able to see how to check the appropriate of correction. An Athena file is attached to look into. Expecting the community to help,

Sumit, You did not ask a question and you did not tell us what the material is. I don't really now how to help you. This page: http://www.xafs.org/Experiment/OverAbsorption has quite a bit of information as well. The document by Matthew is quite useful. Here is a presentation I prepared on the topic of self-absorption corrections. That may help. https://speakerdeck.com/bruceravel/understanding-self-absorption-in- fluorescence-xas B -- Bruce Ravel ------------------------------------ bravel@bnl.gov National Institute of Standards and Technology Synchrotron Methods Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973 Homepage: http://xafs.org/BruceRavel Software: https://github.com/bruceravel