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Figure 2
(a) The form factor of a single helix according to the exact (solid curve) and limiting (dashed curve) formulas. (b) The normalized form factor qLPn/π pertaining to single (n = 1), diametrically symmetric (n = 2) and sixth-order (n = 6) helices. Notice that qLPn/π tends to L/(nl) for qL → ∞. For both (a) and (b), the parameters are radius r = 5, pitch 2πp = 20 and helix length L = 250.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 56| Part 6| December 2023| Pages 1714-1720
https://doi.org/10.1107/S1600576723008671
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