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@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/