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@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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