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Figure 2
Comparison between simplified and analytic form factors. The simplified tube fits the global shape of the exact tube form factor but suppresses the deep minima. Using the same dimensional parameters, the simplified-rod form factor (Zhao et al., 2005BB21) over estimates the intensity at small q (because the volume is too high) and underestimates the intensity at high q (because the surface area is too low).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 40| Part s1| February 2007| Pages s88-s92
doi:10.1107/S0021889807004153
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