Hi Mike: How are you trying to fit it? It looks to me like the post edge line is not in the right place. You need to tune it by hand when you have such a short energy range after the edge since the normalization is critically dependent on how you set this line. carlo On Tue, 15 Jan 2019, Mike Massey wrote:
Hi All,
Does anyone have advice for LCF of spectra with a small edge step?
I've recently found myself with more and more issues fitting spectra like the one shown in the attached photo, where the spectrum is of good quality, but the fits end up not working out due to normalization (as far as I can tell).
Sadly, I have so far ended up just throwing these fits out, but I'm hoping there is a better solution out there that someone might be able to recommend.
One solution is "get more of the element of interest," as a beamline scientist recently told me. I'm just reluctant to really load it up in the data collection, because at 2 keV I get nervous about artifacts like self-absorption.
Is there a better way? What am I missing?
Thanks for your thoughts,
Mike
-- Carlo U. Segre -- Duchossois Leadership Professor of Physics Interim Chair, Department of Chemistry Director, Center for Synchrotron Radiation Research and Instrumentation Illinois Institute of Technology Voice: 312.567.3498 Fax: 312.567.3494 segre@iit.edu http://phys.iit.edu/~segre segre@debian.org