On Monday 26 October 2009 04:42:44 am Annette Pietzsch wrote:
I tried to use the self absorption function of the Athena package (FLUO)
with my Xanes data (Fe3O4 at the Fe L3 edge). The program identifies the
edge correctly, but gives only a zero line for the correction. I think
it might be due
On Monday 26 October 2009 07:35:37 am Jochen Brendt wrote:
I want to use FEFF8 in a program loop and redirect the stdout of this
programm in a textfile. When I run the loop several times this textfile
becomes very large. Does anybody know, if there is a way to suppress the
stdout of FEFF8 ?
Hi Lisa,
Be sure that Athena has been rigorously tested and she does know how to
normalize data. It is much more likely that the default values are not
the best ones for your data.
My book chapter goes over how Athena normalizes data in detail. If you
send me your email address I'll send you a
Shelly,
I agree that Athena applies its (her) algorithm correctly. Whether that
algorithm is correct may be a matter of opinion. The apparent
discrepency Lisa sees is due to Athena's algorithm:
i.e., fit preedge line, fit postedge function to normalization range,
extrapolate both functions to
It is a little hard to evaluate your results, Lisa, without an
example. It may help to attach a small project file which
demonstrates your question.
Without an actual example, I would have to guess that the bottom line
is an odd choice of parameters. This page from the document might be
Lisa,
I think the issue you're seeing is most likely due to telling athena
to fit the data between E0+199 and E0+200 with a constant. I'd
recommend expanding that range some to give Athena a chance -- if
there isn't any data between E=E0+199 and E0+200, Athena won't be able
to figure out what
Hi Chris,
There is nothing sacred about Rbkg=1.0 Ang. It was chosen as a
reasonable default. If you know you have atoms much closer than 2Ang,
lowering Rbkg to half the first neighbor distance is a fine place to
start. You may have to play with this value (and the k-weight used in
the
On Monday 26 October 2009 12:17:38 pm Matt Newville wrote:
If you are writing scripts to loop around Feff, I'd recommend making
sure that each run happens in its own directory.
The reason for that being that Feff happily clobbers any output from a
previous run. Because of this, in both
Hello All,
Would anyone out there have a SrSO4 or SrCO3 standard XANES spectra they
would be willing to share?
There aren't any in the databases of which I am aware, namely Lytle,
GSECARS, and NSLS X18b.
There is a SrCO3 but its really an EXAFS standard (the edge consists of
~3 points.)
Hi Peter,
I think I have one of SrCO3, but it will take me a couple days to dig
it up.
--Scott Calvin
Sarah Lawrence College
On Oct 26, 2009, at 7:10 PM, Peter Nico wrote:
Hello All,
Would anyone out there have a SrSO4 or SrCO3 standard XANES spectra
they would be willing to share?
Dear All,
Can anyone help me with the atom.inp file for ZrCu bulk metallic glass
samples? I am studying the Ag doping effects over the inter-atomic distance
and co-ordination number through Artemis.
thanking you,
sincerely
sanjeev
---
Dr S. Gautam
Nano Materials Analysis Center
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