Re: [Ifeffit] book chapter

15 Jan 2009

      Oh drat.  I didn't realize that this went to the whole list.  Sorry for
filling up your email box.

Shelly
...
-----Original Message-----
From: ifeffit-bounces@millenia.cars.aps.anl.gov [mailto:ifeffit-
bounces@millenia.cars.aps.anl.gov] On Behalf Of Kelly, Shelly
Sent: Thursday, January 15, 2009 12:47 PM
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] book chapter
Wow!  That is one of the best requests. Here you go.
Cheers,
Shelly
...
-----Original Message-----
From: ifeffit-bounces@millenia.cars.aps.anl.gov [mailto:ifeffit-
bounces@millenia.cars.aps.anl.gov] On Behalf Of Hashem Stietiya
Sent: Thursday, January 15, 2009 12:25 PM
To: ifeffit@millenia.cars.aps.anl.gov
Subject: [Ifeffit] book chapter
Dr. Kelly,
I would be thrilled if you could send me a copy.
Thank you,
Hashem Stietiya
Louisiana State University
-----Original Message-----
From: ifeffit-bounces@millenia.cars.aps.anl.gov
[mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf Of
ifeffit-request@millenia.cars.aps.anl.gov
Sent: Thursday, January 15, 2009 12:00 PM
To: ifeffit@millenia.cars.aps.anl.gov
Subject: Ifeffit Digest, Vol 71, Issue 16
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Today's Topics:
1. Re: distinguishing between actual shells and artifacts
      (Kelly, Shelly)

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...
Message: 1
Date: Wed, 14 Jan 2009 13:58:21 -0700
From: "Kelly, Shelly" 
Subject: Re: [Ifeffit] distinguishing between actual shells and
  artifacts
To: "XAFS Analysis using Ifeffit"

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Message-ID:
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Content-Type: text/plain;	charset="iso-8859-1"
Hi Hashem,
I show one method for doing this in my book chapter Figure 14-23 on
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431. (I feel a bit like a broken record).  I will send you a copy if
you
want.
Shelly
...
-----Original Message-----
From: ifeffit-bounces@millenia.cars.aps.anl.gov [mailto:ifeffit-
bounces@millenia.cars.aps.anl.gov] On Behalf Of Voegelin Andreas
Sent: Wednesday, January 14, 2009 9:57 AM
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] distinguishing between actual shells and
artifacts
Hi Hashem
You can copy-paste the respective EXAFS data in Athena and compare
page
the
...
...
backtransforms over the first shell, the first+second shell, the
second
shell.
By comparison of the backtransforms with each other and with the
measured
EXAFS, you can see where the second-shell contribution has its
origin in
k-space (note that the backtransform is not corrected for the
window
function).
For instance, if the second-shell signal adds to the spectrum in
<5A8CCCCD35FC0946BE602D2F43C0218A7DF9FF@AZ18EV808.global.ds.honeywell.co
the
...
...
...
range (where noise should not be a problem), it is likely real and
might
result, e.g., from multiple scattering among first-shell O atoms.
If
low-k
the
...
second-shell signal in the backtransform mainly contributes in the
high-
k
range (where noise or glitches may be a problem), you may be able
to
see
whether it falls together with obvious artefacts (such as
glitches),
or
whether the backtransform matches spectral features that you
consider to
be real.
Andreas
-----------------------------------------------
Andreas Voegelin, PhD
Soil Chemistry Group
Inst. of Biogeochemistry and Pollutant Dynamics
Dept. of Environmental Sciences
ETH Zurich
Universit?tstrasse 16, CHN F24
CH-8092 Z?rich, Switzerland
Phone: +41 44 633 61 47
Fax: +41 44 633 11 18
E-Mail: voegelin@env.ethz.ch
www: http://www.ibp.ethz.ch/people/andreavo
...
-----Original Message-----
From: ifeffit-bounces@millenia.cars.aps.anl.gov
[mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf
Of mstiet2@lsu.edu
Sent: Mittwoch, 14. Januar 2009 14:12
To: ifeffit@millenia.cars.aps.anl.gov
Subject: [Ifeffit] distinguishing between actual shells and
artifacts
Dear all,
I am currently fitting first and second shells with Zn-O and
Zn-Zn paths,respectively. I get second shell features that
could be fit quite well, but I am not certain if they are
actually second shell features or possibly artifacts. For
some samples I get second shell features that I know should
not be present. What criteria would you use to distinguish
between artifacts and actual shells?
Your assistance is appreciated.
Hashem Stietiya
Louisiana State University
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