[Ifeffit] delR and delE
ritika.uppal at yale.edu
ritika.uppal at yale.edu
Thu Oct 14 13:44:31 CDT 2004
Quoting Bruce Ravel <ravel at phys.washington.edu>:
> On Thursday 14 October 2004 2:02 pm, ritika.uppal at yale.edu wrote:
> > I have another question. I have started from the beginning so that
> > could follow all of Shelly's suggestions. I also looked up your
> > guide for artemis fitting in which it says u can click the "fit
> > background" button if u see low R peaks. And then in the end it
> > to click the "use previous background" button. but I can't seem
> > find it. Could anyone direct me??
> That page is rather out of date. The procedure for dealing with
> fitted background changed somewhat. Here's the current situation:
> 1. Co-refine the background by selecting the fit background
> 2. Play around with the value of Rmin to get a good background
> co-refinement without undue correlations with the fitting
> parameters. These correlations are reported in the log file.
> I would say that this procedure helps remove some of the
> as the "correct" value for Rbkg -- the cutoff in Fourier space
> between background and data. If the correlations are quite
> that value is probably too high since you may be damaging the
> by allowing the spline too much freedom.
> 3. In the Data menu is an option that says 'Save background
> subtracted as chi(k)'. This will write a file containing the
> with the fitted spline subtracted out to the project space.
> will then be offered an opportunity to replace the data with
> background subtracted data.
> 4. Choosing to import the background subtracted data will change
> data and unselect the "fit background" button.
> 5. You can now continue along with your data analysis, using the
> newly background-subtracted data.
> 6. If you ever want to return to the non-background-subtracted
> select "Project data -> Import project data" from the File
> This will open the file selection dialog in the folder where
> project's data is stored. You will see the original data along
> with the background-subtracted data and any other data you
> have (at some point) imported into your project.
> Bruce Ravel -----------------------------------
> ravel at phys.washington.edu
> Code 6134, Building 3, Room 405
> Naval Research Laboratory phone: (1) 202
> 767 2268
> Washington DC 20375, USA fax: (1) 202
> 767 4642
> NRL Synchrotron Radiation Consortium (NRL-SRC)
> Beamlines X11a, X11b, X23b
> National Synchrotron Light Source
> Brookhaven National Laboratory, Upton, NY 11973
> My homepage: http://feff.phys.washington.edu/~ravel
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