Index

Powder dictionary (pdCIF) version 1.0.1

_pd_instr_slit_ax_

Definition:

   Describes collimation in the axial direction
   (perpendicular to the plane containing the incident
   and diffracted beams) for the instrument as a slit width
   (as opposed to a divergence angle).
   Values are the width of the slit (in millimetres) defining:
     *_src/mono, collimation between the radiation source
         and the monochromator;
     *_mono/spec, collimation between the monochromator and
         the specimen;
     *_src/spec, collimation between the radiation source
         and the specimen;
     *_spec/anal, collimation between the specimen and the
         analyser;
     *_anal/detc, collimation between the analyser and the
         detector;
     *_spec/detc, collimation between the specimen and the
         detector.

   Note that *_src/spec is used in place of *_src/mono and 
   *_mono/spec if there is no monochromator in use, and 
   *_spec/detc is used in place of *_spec/anal and *_anal/detc 
   if there is no analyser in use.

May appear in list
The permitted range is 0.0 -> infinity

Type: numb

Category: pd_instr