Doppeldiffraktometrische Transmissions-Topographie?

Abstract

It is examined to what extent double diffractometric methods make sense in transmission topography. The result is that they do, but mainly for essentially different reasons than in reflection topography: They also bring—it is true — improvements for the dissolution of small lattice distortions (dislocations etc.), but their main superiority consists in a remarkable gain of intensity and therefore of time. The contrasts in the pictures of transmission topography are preferably produced by ray bending connected with variation of anomalous absorption (BORRMANN-effect) or by variation of extinction, that is, by variation of the rocking curve in hight rather than in abscissa.