Another possibility is that the L-edges of In and Sb are giving considerable energy-dependence to the beam in the EXAFS region...any non-linearity between detectors will make extraction of the EXAFS problematic. Looking at CAMD's XAS beamline mono specs http://www.camd.lsu.edu/beamline_info/DCM_beamline_2008.pdf Si111, Si220 and Ge220 will all cover the Ca K-edge range. -R. On 5/11/2015 3:46 PM, Matthew Marcus wrote:
I found Ca EXAFS files on my data directory which go out to 600eV above the edge, done using Si111. What's the symptom of the failure with InSb? Could harmonics be the problem? If there's something mechanical going on with the mono such that you go through the max of the rocking curve, then as you go through that max, you get more harmonics, which cause normalization failure. mam
On 5/11/2015 11:06 AM, Lisa Bovenkamp wrote:
Hello.
No, the resolution is fine. I can do XANES fine with InSb111. We use those for years. Just had problems with EXAFS because for this long range the flux has to be more stable from the crystals.
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