Gamma-ray diffractometry method for nondestructive dislocation density control in massive quartz crystals

The investigation of dislocation density in massive quartz crystals was carried out with the help of a /spl gamma/-ray diffractometer. Statistical dynamic diffraction theory was used for the dislocation density calculations from experimental results. The compared data were obtained for several quartz crystals on the determination of the dislocation density by various means: using a /spl gamma/-ray diffractometer, X-ray topography and by calculation of etching channels in AT-cut plates for the same crystal. Good agreement between the results obtained by these methods shows that the /spl gamma/-ray diffractometry method can be a method for nondestructive dislocation concentration control in massive quartz crystals.