Dear Marco
Two possible origins to your problems
1- the data format of the input file your are using for your refinement
does not allow counts more than 10^6, This is typically the case with
GSAS input file format
Here at ALBA, as you suggested, we divide all the intensities by factor 10
2- as previously suggested, you might have a problem of detection non
linearity and/or saturation. But since you measured at SLS liklely using
the MYTHEN detector able to accept extremely high count rates , I do not
think this is the problem....
Francois
Dr. FAUTH Francois Experiments Division
CELLS - ALBA http://www.cells.es
Carretera BP 1413 Km 3.3
08290 Cerdanyola del Vallès, Barcelona (Spain)
Phone/Fax +34 93 592 4325 / +34 93 592 4301
On 1/15/2015 8:49 AM, Marco Taddei wrote:
Dear Rietvelders,
Yesterday I was dealing with the refinement of silicon collected with
synchrotron radiation at the MS beamline at SLS. The intensity of many
reflections exceeds 10^6 counts, in some cases even reaching almost
10^7 counts.
I noticed that the peaks exceeding 10^6 counts were kind of truncated,
with the consequence that the pattern looked quite different from what
it was supposed to be.
Since I always treated data from home diffractometers so far, I never
came across such an issue.
My idea was to just divide all of the intensities by 10, so as to
preserve the relative intensities and the signal/background ratio, is
this a possible solution to the issue? Or there are maybe some other
ways to deal with it?
Thanks in advance.
Best,
Marco
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