[Ifeffit] athena update
Bruce Ravel
ravel at phys.washington.edu
Thu May 16 10:40:05 CDT 2002
Hi folks,
I guess I have been a busy boy this week. There's another release of
athena on my web site. New stuff includes:
1. A couple bug fixes and several changes to the layout of the main
window.
2. An automated alignment algorithm which works by varying an e0
shift to minimize the difference spectra of the derivative of
two mu(E) spectra. I would not place great trust in this
algorithm, but it think it will often provide a good first guess
for the e0 shift. It works well for the EuTiO3 data that is
included in the examples. You can use this algorithm from the
alignment dialog or from the data preprocessing options in the
file selection dialog.
3. Athena now checks to see if input data is monotonically
increasing in energy (or wavenumber for chi(k) data). If it is
not, Athena spits up an error message and refuses to read the
data. This choice seems safe, but I am open to suggestions for
other ways to treat the non-monotonic data.
4. A y-axis offset plotting parameter. This is most useful for
stacked plots like in this screenshot:
http://leonardo.phys.washington.edu/~ravel/software/exafs/images/athena/athena_stacked.png
This was done by setting the y-axis offset for the first data
group to 0.5 and to -0.5 for the third data group.
Enjoy,
B
--
Bruce Ravel ----------------------------------- ravel at phys.washington.edu
U.S. Naval Research Laboratory, Code 6134 phone: (1) 202 767 5947
Washington DC 20375, USA fax: (1) 202 767 1697
NRL Synchrotron Radiation Consortium (NRL-SRC)
Beamlines X11a, X11b, X23b, X24c, U4b
National Synchrotron Light Source
Brookhaven National Laboratory, Upton, NY 11973
My homepage: http://feff.phys.washington.edu/~ravel
EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/
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