[Ifeffit] Ca EXAFS with Ge220 or InSb111 (Lisa Bovenkamp)

[Robert Gordon]

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.
>>
>> Lisa
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