Changeset da7b26b in sasmodels for sasmodels/models/fcc_paracrystal.py
- Timestamp:
- Sep 28, 2018 7:33:46 AM (6 years ago)
- Branches:
- master, core_shell_microgels, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests
- Children:
- a5bcd61
- Parents:
- dd16e07
- File:
-
- 1 edited
Legend:
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- Added
- Removed
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sasmodels/models/fcc_paracrystal.py
r2d81cfe rda7b26b 3 3 #note - calculation requires double precision 4 4 r""" 5 .. warning:: This model and this model description are under review following 6 concerns raised by SasView users. If you need to use this model, 7 please email help@sasview.org for the latest situation. *The 8 SasView Developers. September 2018.* 9 10 Definition 11 ---------- 12 5 13 Calculates the scattering from a **face-centered cubic lattice** with 6 14 paracrystalline distortion. Thermal vibrations are considered to be … … 8 16 Paracrystalline distortion is assumed to be isotropic and characterized by 9 17 a Gaussian distribution. 10 11 Definition12 ----------13 18 14 19 The scattering intensity $I(q)$ is calculated as … … 23 28 is the paracrystalline structure factor for a face-centered cubic structure. 24 29 25 Equation (1) of the 1990 reference is used to calculate $Z(q)$, using 26 equations (23)-(25) from the 1987 paper for $Z1$, $Z2$, and $Z3$. 30 Equation (1) of the 1990 reference\ [#CIT1990]_ is used to calculate $Z(q)$, 31 using equations (23)-(25) from the 1987 paper\ [#CIT1987]_ for $Z1$, $Z2$, and 32 $Z3$. 27 33 28 34 The lattice correction (the occupied volume of the lattice) for a … … 88 94 ---------- 89 95 90 Hideki Matsuoka et. al. *Physical Review B*, 36 (1987) 1754-1765 91 (Original Paper) 96 .. [#CIT1987] Hideki Matsuoka et. al. *Physical Review B*, 36 (1987) 1754-1765 97 (Original Paper) 98 .. [#CIT1990] Hideki Matsuoka et. al. *Physical Review B*, 41 (1990) 3854 -3856 99 (Corrections to FCC and BCC lattice structure calculation) 92 100 93 Hideki Matsuoka et. al. *Physical Review B*, 41 (1990) 3854 -3856 94 (Corrections to FCC and BCC lattice structure calculation) 101 Authorship and Verification 102 --------------------------- 103 104 * **Author:** NIST IGOR/DANSE **Date:** pre 2010 105 * **Last Modified by:** Paul Butler **Date:** September 29, 2016 106 * **Last Reviewed by:** Richard Heenan **Date:** March 21, 2016 95 107 """ 96 108
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