[Ifeffit] Ifeffit Digest, Vol 77, Issue 8

[abhijeet gaur]

 Hello Sir,


                I am fitting Cu2O at room temperature. I got the point. So,
the negative value of SS parameter is due to the low value of SO2 guessed by
artemis. I have done the fitting again by fixing the value of SO2 to 0.7.
Now I am gettig positive value of SS parameter which is around 0.007. Please
tell me from where I can get the standard value of SO2 calculated
theoretically in the literature.

with regards

Abhijeet Gaur

Dear Abhijit,
>
>
>
> The parameters So2 and SS are highly correlated. The negative value of SS
> does not make any physical significance. It may be due that Artemis is
> conveging for lower value of So2. In your case (So2=0.552 or 0.61) it is
> very low. Generelly, it should be in the range of 0.7 to 1. It will be
> better if you fix So2 for the standard value calulated theoretically in the
> literature or you can try to get approximated value of SS for So2 around 0.8
> to 0.9.
>
>
>
> regards
>
>
>
> Umesh Palikundwar
>
> Department of Physics
>
> RTM Nagpur University,
>
> Nagpur-440033
>
> _________________________________________________________________
> Missed any of the IPL matches ? Catch a recap of all the action on MSN
> Videos
> http://msnvideos.in/iplt20/msnvideoplayer.aspx
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090704/a969e07e/attachment-0001.html
>
> ------------------------------
>
> Message: 2
> Date: Sat, 4 Jul 2009 09:46:28 -0500 (CDT)
> From: Carlo Segre <segre at iit.edu>
> Subject: Re: [Ifeffit] Re : Cu2O fitting
> To: abhijeet gaur <abhijeetgaur9 at gmail.com>
> Cc: ifeffit at millenia.cars.aps.anl.gov
> Message-ID: <alpine.DEB.2.00.0907040943130.4140 at hydride>
> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>
>
> Hi Abhijeet:
>
> i think you have to start by looking back at your original data.  The
> Chi(k) looks very iffy for a crystalline material such as the kind you are
> model.  Could you send your Athena project with the original data?  My
> suspicion is that the first peak is mostly due to poor background
> subtraction.
>
> Carlo
>
> On Sat, 4 Jul 2009, abhijeet gaur wrote:
>
> > Hi all,
> >          Thanks for the response. I am sorry as I should attach the
> figure
> > in a viewable format. Anyways now I am attaching a the artemis project
> file
> > in which I had used a set positive value for the SS parameter of first
> path.
> > I am not able to understand the reason for negative SS value.
> >                               Thanks again
> >                               Abhijeet Gaur
> >
>
> --
> Carlo U. Segre -- Professor of Physics
> Associate Dean for Graduate Admissions, Graduate College
> Illinois Institute of Technology
> Voice: 312.567.3498            Fax: 312.567.3494
> segre at iit.edu   http://www.iit.edu/~segre   segre at debian.org
>
>
> ------------------------------
>
> _______________________________________________
> Ifeffit mailing list
> Ifeffit at millenia.cars.aps.anl.gov
> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
>
>
> End of Ifeffit Digest, Vol 77, Issue 8
> **************************************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090705/56f73d0b/attachment.html>