[Ifeffit] Rbkg value

[Richard Mayes]

Chris,

If you look at Shelly Kelly's tutorial on xafs.org, she suggests Rbkg be
"about half the R value for the first peak."  This setting worked well in my
case with vanadyl-silicates where my first feature was around 1.6 A. Her
tutorial also discusses setting Rbkg and what to look for when doing so.

-Richard

On Fri, Oct 23, 2009 at 3:51 PM, Chris Patridge <patridge at buffalo.edu>wrote:

>  Hello everyone,
>
>
>
> In removing background, most literature suggests Rbkg value of 1.0 because
> below this represents mostly noise and low freq components not part of the
> scattering effect.  In using Feff and viewing the individual paths
> calculated a number of them have paths near 1.5 A, therefore meaning that
> they have some contributions very close to 1.0 A and below in R space due to
> phase shift.  Has anyone modeled materials which contain these rather short
> Reff and how did you decide what was scattering and noise?
>
>
>
> Thank you all,
>
>
>
>
>
>
>
> Chris Patridge
>
> UB Graduate Student
>
> Department of Chemistry
>
> Cell: 315-529-0501
>
>
>
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