[Ifeffit] a question about the white line

[Barton, David (DG)]

Friends,

Thanks Bruce for forwarding the question to the Ifeffit mailing list regarding background subtraction for samples with strong white lines.  

The Re sample that sparked the question is attached (white line >3mu).  The data is 
not perfect, but it is good enough for discussion.  My first approach to 
subtracting the background was similar to what Matt mentioned (Matt said: "I know
others regularly use kmin >1"), this method seemed to work fairly well using kmin=
1.5 and Rbkg = 1.0.    I then used Matt's suggestion to shift the Eo and keep kmin = 
0.5, this method ultimately gave a similar subtraction albeit with a phase shift 
that should be taken care of when the data is fit to theory.  It will be interesting
to compare the results of the fit using these two methods of background subtraction, 
especially the first shell which is a Re-CO that has a short distance and is 
sensitive to background subtraction.

Thanks,
Dave
  _________________________________ 
  David Barton, PhD
  The Dow Chemical Company 
  Catalysis R&D 
  1776 Building 
  Midland, MI 48674 USA 
  Ph: (989) 636-4753    Fax: (989) 638-6225 
  Email: dgbarton at dow.com 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: SampleB-merged.xmu
Type: application/octet-stream
Size: 19383 bytes
Desc: not available
URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20041208/73b46660/attachment.obj>