Norbert answered the last two but I think that I can give a bit of an answer to the first one. On Fri, 24 Sep 2004, hsnuboy@ksu.edu wrote:
1. What's the meaning and purpose of "Fit Background" in Artemis? I know the backgound as "bare atom" in EXAFS theory. So, what kind of situation we need to use this function?
The background fitting in Artemis is a sort of second chance to remove background that was not completely removed in the initial processing (Athena). It attempts to fit a background function to the residual below the lower R fitting limit (for R-space fitting). I like it because it allows you to be somewhat less concerned about the initial data processing (it is still a good idea to be careful and thorough), particularly with difficult samples with noisy data. HTH, Carlo -- Carlo U. Segre -- Professor of Physics Associate Dean for Special Projects, Graduate College Illinois Institute of Technology Voice: 312.567.3498 Fax: 312.567.3494 Carlo.Segre@iit.edu http://www.iit.edu/~segre