Chris,
You'll answer this question when you post a project file; but since you
mention the pre-edge feature, have you reset the Eo to approx. halfway up
the absorption edge instead of on the pre-edge feature itself?
-Richard
On Tue, Aug 25, 2009 at 11:10 AM, Carlo Segre
Hi Chris:
If you could attach an Athena project file, it would help us to answer your question.
Carlo
On Tue, 25 Aug 2009, Chris Patridge wrote:
Hello all,
After calibration, alignment and merging V K edge data, there seems to be a large peak in R space below 1 A. From most examples and readings, this would seem to be noise since atoms do not reside that close to each other. Adding a background addresses this noise but then the number of variables becomes too large and meaningless to the first shell R space range. I believe the problem lies with the large pre edge feature seen with high valence state Vanadium compounds. Any suggestions on how to work through this and make realistic EXAFS analysis on these compounds.
Thanks everyone,
-- Carlo U. Segre -- Professor of Physics Associate Dean for Graduate Admissions, Graduate College Illinois Institute of Technology Voice: 312.567.3498 Fax: 312.567.3494 segre@iit.edu http://www.iit.edu/~segre segre@debian.org _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit