Hi Mario, The shoulder you observe is what's left from "white" after it is cut off by beta-filer. You could check the absorption edge of Ni and it is right at the shoulder you observe. Peter
__________________________________ Peter Zavalij X-ray Crystallographic Center University of Maryland College Park, MD 20742 Phone/Fax: (301)405-1861 http:/www.chem.umd.edu/crystallography -----Original Message----- From: rietveld_l-requ...@ill.fr [mailto:rietveld_l-requ...@ill.fr] On Behalf Of mariomac...@tux.uis.edu.co Sent: Sunday, September 15, 2013 6:08 PM To: rietveld_l@ill.fr Subject: Instrumental resolution function Dear All, I am calculating the corresponding instrumental resolution function of our Bruker diffractometer which is operating in Bragg-Brentano geometry with Cu radiation, using a nickel filter and LynxEye detector. The calculation is carried out by the Rietveld analysis of the LaB6 (660b) NIST-standard. We observed the Kbeta peaks, but also some shoulders in the left part of the peaks. We have some ideas about this but taking into account that I’m not an actual expert, your comments will be very important to me. In the attached file, I send an image to make a better illustration of my doubts. Thanks in advance for your help. Best Regards, Mario A. Macías Universidad Industrial de Santander Bucaramanga-Colombia.
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