Changeset afd4692 in sasmodels for sasmodels/models/parallelepiped.py
- Timestamp:
- Apr 8, 2017 3:15:43 AM (7 years ago)
- Branches:
- master, core_shell_microgels, costrafo411, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests
- Children:
- 18d732c
- Parents:
- 3fd0499
- File:
-
- 1 edited
Legend:
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- Added
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sasmodels/models/parallelepiped.py
r3fd0499 rafd4692 23 23 24 24 The edge of the solid used to have to satisfy the condition that $A < B < C$. 25 After some improvements to the effective radius calculation, used with an S(Q),26 it is beleived that this is no longer the case.25 After some improvements to the effective radius calculation, used with 26 an S(Q), it is beleived that this is no longer the case. 27 27 28 28 The 1D scattering intensity $I(q)$ is calculated as: … … 72 72 73 73 NB: The 2nd virial coefficient of the parallelepiped is calculated based on 74 the averaged effective radius, after appropriately 75 sorting the three dimensions, to give an oblate or prolate particle, $(=\sqrt{A B /\pi})$ and74 the averaged effective radius, after appropriately sorting the three 75 dimensions, to give an oblate or prolate particle, $(=\sqrt{AB/\pi})$ and 76 76 length $(= C)$ values, and used as the effective radius for 77 77 $S(q)$ when $P(q) \cdot S(q)$ is applied. … … 106 106 .. figure:: img/parallelepiped_angle_definition.png 107 107 108 Definition of the angles for oriented parallelepiped, shown with $A < B <C$.108 Definition of the angles for oriented parallelepiped, shown with $A<B<C$. 109 109 110 110 .. figure:: img/parallelepiped_angle_projection.png … … 167 167 ---------------------------- 168 168 169 * **Author:** This model is based on form factor calculations implemented in a c-library170 provided by the NIST Center for Neutron Research (Kline, 2006).169 * **Author:** This model is based on form factor calculations implemented 170 in a c-library provided by the NIST Center for Neutron Research (Kline, 2006). 171 171 * **Last Modified by:** Paul Kienzle **Date:** April 05, 2017 172 172 * **Last Reviewed by:** Richard Heenan **Date:** April 06, 2017
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