Thanks for your helpful reply, kicaj!
I tried deglitching, but it seems not perfect ,I am afraid it removed some useful spectra information and also changed original spectra shape a little too, will it impact fitting quality?

I attached the graph this time, and would you please explain to me the details of subtract peaks which you mentioned before?

Best Regards,


------------ Original Message ------------
From : ifeffit-request@millenia.cars.aps.anl.gov
To : ifeffit@millenia.cars.aps.anl.gov
Mail Subject : Ifeffit Digest, Vol 118, Issue 9
Sent : Tue, 11 Dec 2012 12:00:01 -0600

Send Ifeffit mailing list submissions to
ifeffit@millenia.cars.aps.anl.gov

To subscribe or unsubscribe via the World Wide Web, visit
http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
or, via email, send a message with subject or body 'help' to
ifeffit-request@millenia.cars.aps.anl.gov

You can reach the person managing the list at
ifeffit-owner@millenia.cars.aps.anl.gov

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Ifeffit digest..."


Today's Topics:

1. Re: {Spam?} {Disarmed} How to do with diffraction peak
(Dr. Dariusz A. Zaj?c)


----------------------------------------------------------------------

Message: 1
Date: Tue, 11 Dec 2012 08:51:23 +0100
From: "Dr. Dariusz A. Zaj?c"
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] {Spam?} {Disarmed} How to do with diffraction
peak
Message-ID: <50C6E5FB.5020900@ifj.edu.pl>
Content-Type: text/plain; Zharset="utf-8"; Format="flowed"

Definitely XRD peaks are not EXAFS oscillations, thus you should exclude
them from data analysis. The simplest way is to use deglitching tool
from Athena. More complicated one is to subtract peaks (if you know very
well their shapes). If you have still access to the experiment - tray to
measure sample at different angle sample surface -detector, than you can
shift the position of the diffraction peaks in energy scale. After
merging of few of this scans you eliminate XRD peaks.
Have you measured with one pixel fluorescence detector? For such
experiments the use of multi-element detector can be also useful...

regards
kicaj

p.s. I didnt check the attached file. Next time, please, give a link to
a graph, not attach the file

W dniu 12-12-11 08:08, Zhaomo Tian pisze:
> Dear all,
>
> I got XAFS data for Ag with CO adsorption( using Ag K edge), Ag is
> thin film~300nm deposited on Si/SiO2 substrate. But in the original
> ?(E) spectra, from 25894-26044eV, four obvious diffraction peaks
> appear( I attached the file), and I guess they will influence the
> quality of fitting. Is there anyone who knows how to deal with these
> diffraction peak? Will it be corrected by smoothing or changing some
> origin data points in the original file? I want the modification that
> will not destroy data analysis later.
>
> Thanks for your help.
>
> *Tian Zhaomo*
>
> *M.S. candidate*
>
> *Lab. For Photosynthesis Materials and Devices*
>
> Department of Materials Science and Engineeing,POSTECH
>
> san 31, Hyoja-Dong, Nam-Gu,
> Pohang, 790-784, Republic of Korea
>
> office: +82-54-279-2827
>
> mobile: +82-10-7747-3790
>
> e-mail: zhaomo1989@postech.ac.kr
>
>
>
> Web Bug from
> http://mail.postech.ac.kr/mail/PutAck.jsp?ack_args=c2VudF9maWxlPXpoYW9tbzE5ODlAcG9zdGVjaC5hYy5rci8uU2VudC8xMzU1MjA5NjgzMjg5Ljg2MzIwLnBvc3RlY2gmc2VuZF9kYXRlPTIwMTIxMjExMTYwODAzJnN1YmplY3Q9SG93IHRvIGRvIHdpdGggZGlmZnJhY3Rpb24gcGVhaw==&to_email=ifeffit@millenia.cars.aps.anl.gov_____________________________________________________________________________________________________________________
>
>
>
> _______________________________________________
> Ifeffit mailing list
> Ifeffit@millenia.cars.aps.anl.gov
> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit

-------------- next part --------------
An HTML attachment was scrubbed...
URL:

------------------------------

_______________________________________________
Ifeffit mailing list
Ifeffit@millenia.cars.aps.anl.gov
http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit


End of Ifeffit Digest, Vol 118, Issue 9
***************************************