Abstract
The theory of light-scattering by systems of linelike scattering units is presented in a form suitable for studying light-scattering by dislocation networks in transparent solids. The theory is applied to light scattering by single crystals of Harshaw potassium chloride which was measured for different wave-lengths and scattering angles and for different orientations of the crystal with respect to the direction of the incident light beam. It was found that the scattering system has fourfold axes of rotation parallel to the 〈100〉 directions of the crystal, and a partial Fourier analysis of the scattering power indicates that the scattering is mainly produced by networks of dislocations in the {100} planes, the individual lines being mostly directed along the 〈100〉 directions of the crystal. The rods have a width of about 1000 A and are, most probably, not perfectly straight; the latter feature prevents an estimate of their length.
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