[phenixbb] Units in intensity?
murpholinox at gmail.com
Wed Mar 6 14:17:49 PST 2019
The counts are the number of x-ray photons converted to electrons?
El mié., 6 de mar. de 2019 a la(s) 15:18, Tim Gruene (tim.gruene at psi.ch)
> Dear Murpholino,
> the unit of intensity is '1' - it is the counts on the detector. The scale
> arbitrary, you can multiply your intensity with any positive number you
> as long as you don't create an overflow or underflow in the computer
> As long as you do the same with the sigma-values, your refinement should
> Best regards,
> On Wednesday, March 6, 2019 10:00:55 PM CET Murpholino Peligro wrote:
> > If I do `phenix.xtriage XDS_ASCII.HKL` I get a log file. In the
> > for data merging" of this log file I have:
> > Resolution: 26.02 - 1.40
> > Observations: 44675
> > Unique reflections: 16306
> > Redundancy: 2.7
> > Completeness: 70.37%
> > Mean intensity: 1656.8
> > Mean I/sigma(I): 19.8
> > SigI < 0 (rejected): 644 observations
> > R-merge: 0.027
> > R-meas: 0.032
> > R-pim: 0.017
> > My question is... what units does Mean intensity has?
> > Thanks
> > Ps I am not sure if this has to do with the detector used which was a CCD
> > (type) ADSC QUANTUM 210 (model).
> Tim Gruene
> Head of the Centre for X-ray Structure Analysis
> Faculty of Chemistry
> University of Vienna
> Phone: +43-1-4277-70202
> GPG Key ID = A46BEE1A
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