The measurement of integrated intensities

Expressions for the integrated intensities of the Laue and of the rotating-crystal methods are given, which take the spectral distribution of the incident radiation into account. The correlation between the integrated intensities of both methods is elucidated. A procedure is described for the measurement of integrated intensities on an absolute scale using radiation with a continuous spectral distribution superimposed by sharp (spectral) lines. It is shown that crystal-monochromatized radiation may also exhibit, besides sharp lines, continuous tails. Neglecting these tails causes errors up to 2% for observed integrated intensities.