[Ifeffit] Dafs - DIFFKK

Bruce Ravel bravel at bnl.gov
Wed Apr 9 15:54:25 CDT 2014

Wow!  A diffkk question.  Such a blast from the past!

Have you examined the examples Matt provides at 
http://cars9.uchicago.edu/dafs/diffkk/ ?

Diffkk isn't exactly a DAFS analysis program, but it's a tool that may 
be useful for analyzing your dafs.  Diffkk takes XAFS data as input, 
converts it to f" and does a Kramers-Kronig transform to make an f' 
function with fine structure wiggles.  There is a lot more to dafs 
analysis than just that.

I'm not sure if anyone who contributes regularly to the list has done a 
dafs experiment recently.  I certainly haven't.  I'm not sure if any 
packaged software is available.  Many of us wrote our own in a one-off 
manner.  That's what I did.

Perhaps someone else can comment....

Good luck,

On 04/09/2014 04:39 PM, Alessandro Lisboa wrote:
> Dear,
> My name is Alessandro Lisboa. I am a phd student of physics in Brazil -
> University of Brasilia. In the last February was held the first
> experiment DAFS in the Laboratório Nacional de Luz Síncrotron of Brazil.
> I performed this experiment and now I'm trying to analyze the data. I am
> having difficulty to establishing a procedure for analysis. I've read
> many things about.
> I tried to generate the diffkk.inp but I can not get result. I do not
> know what I'm doing wrong.
> I ask, please, help me with a procedure to analyze. For example, what is
> the sequence of files that need to create and run?
> I would be eternally grateful for your help.
> Regards,
> Alessandro Lisboa
> --
> -----
> /M.Sc. Alessandro F. Lisboa Moreira
> Ph.D. Student
> Complex Fluids Group
> Universidade de Brasília (UnB) - Instituto de Física
> Brasília/DF (Brazil)/
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  Bruce Ravel  ------------------------------------ bravel at bnl.gov

  National Institute of Standards and Technology
  Synchrotron Science Group at NSLS --- Beamlines U7A, X24A, X23A2
  Building 535A
  Upton NY, 11973

  Homepage:    http://xafs.org/BruceRavel
  Software:    https://github.com/bruceravel

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