[Ifeffit] Differences between fluorescence and transmission of the same sample

[Andrew Campos]

Hi everyone,

My lab mates are running in-situ H2 reduction of Cobalt/SiO2 catalysts
using the Co K-edge and are obtaining differences between the
fluorescence and transmission signals. The in-situ cell does have
quite a bit of sample thickness (2-3 mm approx) and I was wondering if
the fluorescence signal only has a penetration depth of a few
micrometers. If this is the case that would explain it where the side
that is further away from the heating element is more oxidized than
the rest of the sample.

Has anyone run into this problem before? We're using the basic
furnace/cryostat unit (in-situ cell manufactured by the exafsco) and a
13 element fluorescence detector (germanium diode).

I appreciate any insight into the issue, I have attached a
fluorescence and transmission spectrum collected at the same time
where the transmission and fluorescence are in the .prj file.

Thanks so much!
Andrew
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