Debye Scherrer procedure

the Debye Scherrer procedure (also powder method) is a procedure for the crystal analysis.

The procedure was developed 1916 by the physicists Peter Debye and Paul Scherrer.

structure

Schematische Darstellung des Debye-Scherrer-Verfahrens
schematic representation of the Debye Scherrer procedure

around a sample from pulverized (therefore it also the name powder method) crystalline material is set up with distance a photographic film. This forms (nearly complete) a circle around the sample. The sample with X-ray is fired at by the gap.

circular samples form observation on the film. If the X-ray meet a crystalline particle of the sample straight in such a way the fact that the Bragg equation is fulfilled is optimally bent it, i.e. they strengthen mutually (see. Interference), and produce with the other optimally bent jets of an atomic plane a cone. The image of the cone is to be seen on the film. The cone images can be taken up by a regular rotation for all atomic planes.



See also: Bragg equation and Laue procedure

 

  > German to English > de.wikipedia.org (Machine translated into English)