Calculations / Corrections
Main parameters used on profile calculations are presented here.
Simulation / Refinement mode [Job]
Define the type of job for this pattern
Peak shape [Npr]
Default value for selection of a normalized peak shape function.
The rest of parameters are related about corrections on the calculated profiles
Diffraction geometry [Ilo]
Lorentz and polarization corrections depending of geometry of the diffractometer.
IRF [Res]
Instrumental resolution file is used or not and define the model to use
Preferred orientation [Nor]
Define the model for preferred orientation
External correction integrated / Profile intensities [Cor]
Apply external intensity correction with external file
Absorption correction (T.O.F) [Iabscor]
Type of absorption correction for T.O.F. data
Range of calculation of a single reflection in units of FWHM [Wdt]
Represent the width of calculated profile of a single Bragg reflection in units of FWFH.
Typical values are:
Peaks below this 2Theta limit are corrected for asymmetry [AsyLim]
Peaks below this 2θ limit are corrected for asymmetry
Monochromator polarization correction [Cthm]
Coefficient for monochromator polarization correction
Absorption correction coefficient (μR) [muR]
Absorption correction coefficient μR (μ is the effective absorption coefficient; R the radius or thickness of the sample), used only
for refinement on cylindrical samples and flat samples with symmetrical θ-2θ scanning (the scattering vector lying within the sample plane).
Incident beam angle at sample surface [PSD]
Incident beam angle at sample surface in degrees
Correction for illuminated area exceeding the sample surface [Sent0]
Theta angle at which the sample intercepts completely the x-ray beam.
Below SENT0 part of the beam doesn't touch the sample and the intensity of reflections below SENT0 have to be multiplied by the factor:
Fraction of mosaic crystal (Transmission) / Polarization factor [Rpolarz]
The value is the Polarization factor in a synchrotron experiment (Ilo=2) or the Fraction mosaic-crystal for transmission geometry.
Equivalence on PCR file
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