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Figure 1
Illustration of the direct integration method employed. The circle represents the collimation image on the detector within which the radiation detected at q originates (Miller et al., 1984BB18). The ideal intensity is evaluated as a cubic (spline) polynomial with coefficients that vary depending on the interval. In this example, s has been divided into three intervals, corresponding to different angles θ. The first term in the integration in equation (11)[link] starts from [\theta = 0], corresponding to q-k, and extends to an angle that corresponds to [q-k+\delta]. The next term is an integral between angles corresponding to [q-k+\delta] and [q-k+2\delta]. The final term is an integral between angles corresponding to [q-k+2\delta] and [q-k+3\delta = q+k], the latter of which makes an angle π.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 49| Part 1| February 2016| Pages 47-54
doi:10.1107/S1600576715023444
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