Changeset eb69cce in sasmodels for sasmodels/models/guinier.py
- Timestamp:
- Nov 30, 2015 9:18:41 PM (8 years ago)
- Branches:
- master, core_shell_microgels, costrafo411, magnetic_model, release_v0.94, release_v0.95, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests
- Children:
- d18f8a8
- Parents:
- d138d43
- File:
-
- 1 edited
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sasmodels/models/guinier.py
r66ebdd6 reb69cce 1 1 r""" 2 Guinier (Model)3 4 2 Definition 5 3 ---------- … … 7 5 This model fits the Guinier function 8 6 9 .. math:: Q_1=\frac{1}{R_g}\sqrt{\frac{(m-s)(3-s)}{2}}7 .. math:: q_1=\frac{1}{R_g}\sqrt{\frac{(m-s)(3-s)}{2}} 10 8 11 to the data directly without any need for linearisation (*cf*. Ln *I(q)* vs *q*\ :sup:`2`). 9 to the data directly without any need for linearisation 10 (*cf*. $\ln I(q)$ vs $q^2$\ ). 12 11 13 For 2D data: The 2D scattering intensity is calculated in the same way as 1D, where the *q* vector is defined as 12 For 2D data the scattering intensity is calculated in the same way as 1D, 13 where the $q$ vector is defined as 14 14 15 15 .. math:: q=\sqrt{q_x^2 + q_y^2} 16 16 17 REFERENCE 17 References 18 ---------- 18 19 19 A Guinier and G Fournet, *Small-Angle Scattering of X-Rays*, John Wiley & Sons, New York (1955) 20 A Guinier and G Fournet, *Small-Angle Scattering of X-Rays*, 21 John Wiley & Sons, New York (1955) 20 22 """ 21 23
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