Hi Rana, in the simple approximation E0 can be connected to electronic configuration of ion, in your situation (but I can only guess) ions can have different E0's (Fe, Mn), but in the first step I would keep one E0 value for each ion (one E0 for O, one for Fe, etc), especially that you are focused on first shell of oxygen here we/I had a small discussion about E0 http://www.mail-archive.com/ifeffit@millenia.cars.aps.anl.gov/msg01745.html here you can find also something http://xafs.org/Tutorials?action=AttachFile&do=get&target=Newville_Intro.pdf best regards darek -----Wiadomość oryginalna----- Od: ifeffit-bounces@millenia.cars.aps.anl.gov w imieniu Jatinkumar Rana Wysłano: Śr 2010-07-28 09:40 Do: ifeffit@millenia.cars.aps.anl.gov Temat: Re: [Ifeffit] Ifeffit Digest, Vol 89, Issue 17 Hello Darek, Thank you so much for your reply. Yes, i can rely on model, we have performed reitveld refinement to get the crystallographic data. To my knowledge, there should not be any other phases. Your suggestion is quite right. Somehow, i have to constrain my parameters (to reduce the no. of parameters) and try to fit it. However, I would like to ask you following questions. I am confused about the term "Delta E0" what is the theoretical meaning of that in terms of photoelectron interactions ? If you have multiple atomic sites of absorbing atom, should "Delta E0" be same for all of them (assuming all absorbing atoms are at same oxidizing state) ? I am looking forward to your comments.. Best regards, Rana On 27.07.2010 19:00, ifeffit-request@millenia.cars.aps.anl.gov wrote:

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Today's Topics:

1. updating Athena in Windows 7 (Monson, Todd) 2. ODP: Ifeffit Digest, Vol 88, Issue 12 (Zajac, Dariusz A.)

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Message: 1 Date: Mon, 26 Jul 2010 14:39:00 -0600 From: "Monson, Todd" To: "ifeffit@millenia.cars.aps.anl.gov" Subject: [Ifeffit] updating Athena in Windows 7 Message-ID: Content-Type: text/plain; charset="us-ascii"

On Saturday, while starting up Athena, I was informed that there was an update to Athena available. I tried installing the update but failed. I am afraid this is due to some user permission issue in windows 7. How can I try to reinstall the update and ensure that it works? Thanks, Todd

Todd Monson Sandia National Labs Nanomaterials Sciences P.O. Box 5800, MS 1415 Albuquerque, NM 87185-1415 (505) 845-2129 Fax: (505) 844-5470