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SEDEM
Software package for Exafs Data Extraction and Modeling
HARDWARE  PC (DOS). requires 2 Mo of XMS
 
DOWNLOAD  Download it Here (updated 99/03/25).
To get the latest version, contact the author
 
AUTHORS  Daniel ABERDAM, Laboratoire de Cristallographie, CNRS, 25 Avenue des Martyrs, BP 166, F38042 Grenoble cedex 9 France
 
NOTES  The SEDEM package is divided in four items:
    The SEDEM package is divided in two main items
    • The XAFS item is used to extract the EXAFS from raw data which can by read on line during acquisition. The tools for extraction are built in order to provide a very accurate control on every step. No extrapolation of base line is necessary. The decreasing behaviour of data intensity is adjusted on the atomic absorption computed from the Cromer & Liberman fPrime program. Provision is made to carefully evaluate uncertainties.
    • A small XafsSum item is used to sum raw spectra, with special care to possible dispersion in energy.
    • The Modl item is used for simulation and modeling. Reference data may be either extracted from experiment, or read from FEFF files. McKale tables are also available. Besides the classical gradient minimization algorithm, decorrelation of phases and amplitudes is implemented. This permits to handle non harmonic systems via a Cumulant expansion. Statistics includes standard deviation of data, correlation matrix, merit factor, and calculations of correlations between pairs of parameters.
    • With the small Cumul item one recovers the distance distribution function, given the cumulant expansion of the non harmonic or disordered material.

    The sedem.zip file contains:
    • XafsSum.exe, XAFS.exe, Modl.exe, Cumul.exe, the corpus of the software package.
    • RTM.exe, DPMI16b.ovl, EGAVGA.bgi, litt.Chr, accessories required to run.
    • XAFSdoc.txt, ModlDoc.txt, containing first contact informations.
    • The four compacted *.exe of McKale's tables, which MUST be decompacted, and frw.08. All MUST be present at their right location.
    • Kpolyn.dat and Lpolyn.dat, containing the parameters of the polynomial fits to the Cromer & Liberman mu/ro atomic absorption for K and L absorption edges.
    • UnixtoPC.exe and zConnect.exe, required to communicate with the acquisition work-station.
    • And the whole required directory structure of the package, with some exemple files.

    More information is available Here
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