THE UWXAFS ANALYSIS PACKAGE - PHILOSOPHY AND DETAILS

The requirements for a reliable analysis program for XAFS spectra to o btain structural information are listed. Besides the more generally re cognized items, it is emphasized that criteria to assess whether the m odel found is reasonable, and a fast and reliable error analysis which assures that the information content of the data is not exceeded, sho uld be included. The University of Washington analysis program UWXAFS is described which satisfies the listed requirements and includes mult iple scattering (MS) contributions in an efficient manner utilizing th e FEFF program, and fits in R-space to allow limiting the MS paths.