Thank you! Best, Ke On Thu, Oct 16, 2014 at 11:01 AM, Latta, Drew E wrote:

Hi Ke,

Unfortunately, it looks like your data is showing the classic symptoms of self-absorption . The white line for UO2 is fairly pronounced, and should look like the attached picture.

Not sure on the setup at 12-BM-B, but next time ask if you could collect both fluorescence and transmission data at the same time. It can really save your behind.

You can dilute in whatever low Z compound you’d like, I think things like SiO2 and boron nitride are common because of their low Z. Graphite might work also. Powder smears on tape are pretty common because you can fold/unfold to vary the amount of material in the beam. (though one can’t manipulate those at the beamline with a dispersible rad powder like UO2.)

Best,

Drew

*From:* Ke Yuan [mailto:keyuan@umich.edu] *Sent:* Thursday, October 16, 2014 8:39 AM *To:* ifeffit@millenia.cars.aps.anl.gov; Latta, Drew E *Subject:* Re: XAFS Analysis using Ifeffit

Sorry here is the picture!

On Thu, Oct 16, 2014 at 9:37 AM, Ke Yuan wrote:

Hello Drew,

Thanks for your suggestions. I just checked my original data without normalization. The edge step is about 0.7 (see pic attached). I did the measurement in fluorescence mode at APS, beamline 12-BMB. What do you think about this pic?

For the sample preparation, I think I need to mix UO2 with some other materials to dilute it. Do you have any suggestions on the matrix materials?

Best,

Ke

--

Ke Yuan

PhD Candidate

Department of Earth and Environmental Sciences 1100 North University Ave 3021 C.C Little University of Michigan, Ann Arbor MI 48109-1005

-- Ke Yuan PhD Candidate Department of Earth and Environmental Sciences 1100 North University Ave 3021 C.C Little University of Michigan, Ann Arbor MI 48109-1005