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Figure 3
Comparison of scattering curves for a sphere (solid curve), a torus (dashed curve) and a hollow cylinder with square cross section (dotted curve). The radius of the sphere is 5 Å. The volume of the torus is the same as that of the sphere. The parameters a and b are 2.37 and 4.73 Å, respectively (b/a = 2). For the hollow cylinder, the volume and the parameter b are equal to those of the torus (the edge 2a of the square cross section is 4.20 Å). The abscissa is expressed by s (Å−1) = 2sinθ/λ, where 2θ is the scattering angle and λ is the wavelength. In the curve of the torus, the position of the first minimum is denoted by s*.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 34| Part 5| September 2001| Pages 580-584
doi:10.1107/S0021889801009517
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