Index

Image CIF dictionary (imgCIF) version 3.00.04

_diffrn_radiation.div_y_source

Definition:

   
     Beam crossfire in degrees parallel to the laboratory Y axis
     (see AXIS category).
     This is a characteristic of the X-ray beam as it illuminates
     the sample (or specimen) after all monochromation and
     collimation.
     This is the standard uncertainty (e.s.d.) of the directions
     of photons in the YZ plane around the mean source beam
     direction.
     Note that for some synchrotrons this value is specified
     in milliradians, in which case a conversion is needed.
     To convert a value in milliradians to a value in degrees,
     multiply by 0.180 and divide by \p.

Type: Real

Units: degrees

Category:
diffrn_radiation