[Ifeffit] Amplitude in Artemis

[Carlo Segre]

Dear Paul:

If you could give us more detail about the model, it might help us 
interpret the amp>1 question.  What is needed is the following

what is the data of?

what is the structural model you are using?

an Artemis project file could also help.

Cheers,

Carlo


On Mon, 27 Feb 2006, Paul wrote:

> Uncertainty can get fairly close to 0 (+/- 0.1)  but amp gets up anywhere 
> from 2 to 4 depending on what data set I'm fitting to.
>
> ----- Original Message ----- From: "Scott Calvin" <SCalvin at slc.edu>
> To: "XAFS Analysis using Ifeffit" <ifeffit at millenia.cars.aps.anl.gov>
> Cc: <SCalvin at slc.edu>
> Sent: Monday, February 27, 2006 10:56 AM
> Subject: Re: [Ifeffit] Amplitude in Artemis
>
>
>> How far above 1? And with what uncertainty?
>> 
>> --Scott Calvin
>> Sarah Lawrence College
>> 
>> At 07:52 PM 2/26/2006, you wrote:
>>> I have just started a PhD and have been given alot of EXAFS data to 
>>> simulate but I don't know much about artemis. I have tried to fit the data 
>>> for quite some time now, but can't get any kind of good fit unless the 
>>> amplitude is above 1. Is there any way amp can be above 1 and rationally 
>>> explained?
>>> 
>> 
>> 
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>
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-- 
Carlo U. Segre -- Professor of Physics
Associate Dean for Special Projects, Graduate College
Illinois Institute of Technology
Voice: 312.567.3498            Fax: 312.567.3494
Carlo.Segre at iit.edu    http://www.iit.edu/~segre