I find that the main effect of the multi-electron excitations is to make a pair
of bumps in an unfortunate region of the spectrum, which need to be subtracted
out before
EXAFS analysis can begin. The positions and amplitudes of these bumps are
known for Ce3+ and Ce4+, so if you start with post
Thanks for the responses. When I had originally tried fitting the CeO2 data,
the fit was awful, but I think it was because the Eo was really far off. I set
it close to where it should be and was able to find a common feature in Io to
calibrate the rest of the samples to.
That being said, fittin
Just a caveat - CeO2 and Ce(OH)4 have XANES which isn't quite the same
as other Ce4+. There's a shoulder on the low side, as if it were
slightly reduced, and the first peak is at a slightly different
position. Of course, you can use LCF with CeO2 as one of the refs if
you need to.
Dear Neil,
Sorry this may be too exact an interpretation of your English, but if you are
looking at the exafs then calibration is normally pretty irrelevant as long as
it is not wildly out, as you refine E0 anyway in the fitting.
The bond distances will be very little altered by this.
If you a
Hello Neil,
I guess you might have tried this already - do you have any signatures in the
I0 data? Such as a glitch or any other edge absorption. Sometimes these can be
used as “internal calibration”.
-Riti Sarangi
> On Jul 12, 2016, at 2:54 PM, Neil M Schweitzer
> wrote:
>
> Hello,
> Long t
Hello,
Long time follower/user and first time subscriber! I work at Northwestern
University, and one of the services I provide is analyzing XAS data for users
who collect data at APS. Generally, I am not at APS to help them collect
spectra, I help analyze the data afterwards. A user came to me r
