Hi Victor, I have posted your question to diffpy-users google group (http://groups.google.com/group/diffpy-users?hl=en) which hosts discussions on issues related to PDF and PDF software from our group.
I am cc'ing this to the rietveld list in case anyone there is interested and unaware of this other discussion group for practical feedback on using PDF programs. Best wishes, Simon On Mon, Jul 7, 2008 at 4:27 PM, Victor Wessels <[EMAIL PROTECTED]> wrote: > Hi All, > > I hope this is not too off-topic as it is not specifically a Rietveld > question. > > I am studying liquid data for an alloy containing Hf, and I am > encountering some persistent problems with correction. I use the > fluorescence correction in PDFgetX2 (thanks by the way for the great > software, I am just beginning to use PDFfit as well) to correct the > baseline at high q, but this leaves me with unphysically high intensity at > low q (first peak in S(q)). > > Could the extra intensity after the fluorescence is removed be due to > anomalous scattering? The incident x-ray intensity is 125 keV. The Hf > K-edge is located at 65.4 keV. > > Any help would be appreciated, or if anyone knows of a good paper > addressing a similar issue, I would love to know about it. > > Regards, > Victor > > -- Prof. Simon Billinge Applied Physics & Applied Mathematics Columbia University 500 West 120th Street Room 200 Mudd, MC 4701 New York, NY 10027 Tel: (212)-854-2918 Condensed Matter and Materials Science Brookhaven National Laboratory P.O. Box 5000 Upton, NY 11973-5000 (631)-344-5387 email: sb2896 at columbia dot edu home: http://nirt.pa.msu.edu/
