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Item _diffrn_radiation.div_y_source

Description

              Beam crossfire in degrees parallel to the laboratory Y axis
               (see AXIS category).

               This is a characteristic of the xray beam as it illuminates
               the sample (or specimen) after all monochromation and
               collimation.

               This is the esd of the directions of photons in the Y-Z plane
               around the mean source beam direction.

               Note that some synchrotrons specify this value in milliradians,
               in which case a conversion would be needed.  To go from a
               value in milliradians to a value in degrees, multiply by 0.180
               and divide by \p.

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