[Ifeffit] amplitude parameter S02 larger than 1

Bruce Ravel bravel at bnl.gov
Fri Mar 20 12:47:51 CDT 2015

On 03/20/2015 01:44 PM, huyanyun at physics.utoronto.ca wrote:
> I agree that P would be 100% correlated with S02 if we assume both sites
> have the same first-shell distance. In my fit, the correlation between
> the percentage parameter P and S02 is -0.73.
> Do you have any good idea on how to break this kind of correlation, or
> alternative way to find the 'true S02' and 'true P'?

That would usually require some kind of prior knowledge -- something you 
somehow knew about your sample before beginning the EXAFS analysis.


  Bruce Ravel  ------------------------------------ bravel at bnl.gov

  National Institute of Standards and Technology
  Synchrotron Science Group at NSLS-II
  Building 535A
  Upton NY, 11973

  Homepage:    http://bruceravel.github.io/home/
  Software:    https://github.com/bruceravel
  Demeter:     http://bruceravel.github.io/demeter/

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