[Ifeffit] Ca EXAFS with Ge220 or InSb111 (Lisa Bovenkamp)
ragordon at alumni.sfu.ca
Mon May 11 15:51:59 CDT 2015
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
Si111, Si220 and Ge220 will all cover the Ca K-edge range.
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.
> On 5/11/2015 11:06 AM, Lisa Bovenkamp wrote:
>> 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.
>> Ifeffit mailing list
>> Ifeffit at millenia.cars.aps.anl.gov
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