[Ifeffit] Artemis multiple edge refinement problem

[Bruce Ravel]

On Tuesday 23 June 2009 12:21:06 pm alessandro di domenico wrote:
> Hello to everyone; I'm a master thesist student in physics and I'mdoing a
> XAS analysis on bimetallic nanoparticles. my problem is that when
> I try to do a refinement on two different edges (K-Pd and L3-Au) Artemis
> changes
> one of the experimental data-set. Say that I have the data set for the
> K-edge of Pd and L3-edge of Au (which are plotted correctly); after the fit
> one of the two data set are plotted different. it seems that experimental
> data have been modified....
> I don't know what to do about it; maybe I'm doing something wrong but
> unfortunately there isn't a complete guide to artemis .
> On the internet i have found some pdf which deals with the argument but
> don't focus on the procedure that one has to do in the program.
> Has someone ever had this problem, and if not can someone suggest me a
> "tutorial" on multiple edge refinement with artemis that I can follow step
> by step?
> Thank you

Hi Alessandro,

It is really hard to understand this problem without an example.
Could you prepare a *small and simple* example of a artemis project
file which displays this misbehavior and also let us know something
about the computer and artemis version you are using.

B

PS: when preparing a project file as an example, please be mindful of
the discussion about large attachments from last week:

  http://millenia.cars.aps.anl.gov/pipermail/ifeffit/2009-June/004307.html

PPS: Scott's example of analyzing ZnO prepared in the form of a series
of artemis project files is distributed with the software.  Look in
the examples/Artemis folder in the location where Ifeffit is installed
(Windows) or the tarball is unpacked (not Windows).

-- 

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

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

 My homepage:    http://xafs.org/BruceRavel
 EXAFS software: http://cars9.uchicago.edu/~ravel/software/exafs/