[Ifeffit] Vanadium pre edge peak contributes to K-space?

[Richard Mayes]

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 <segre at iit.edu> wrote:

>
> 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 at iit.edu   http://www.iit.edu/~segre   segre at debian.org
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