Changeset c1e44e5 in sasmodels for sasmodels/models/core_shell_ellipsoid.py
- Timestamp:
- Mar 30, 2019 1:59:45 AM (5 years ago)
- Branches:
- master
- Children:
- a42b091
- Parents:
- 663d2a8
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- 1 edited
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sasmodels/models/core_shell_ellipsoid.py
re5a8f33 rc1e44e5 3 3 ---------- 4 4 5 Parameters for this model are the core axial ratio $X_{core}$ and a shell 6 thickness $t_{shell}$, which are more often what we would like to determine 7 and make the model better behaved, particularly when polydispersity is 8 applied, than the four independent radii used in the original parameterization 5 Parameters for this model are the core axial ratio $X_{core}$ and a shell 6 thickness $t_{shell}$, which are more often what we would like to determine 7 and make the model better behaved, particularly when polydispersity is 8 applied, than the four independent radii used in the original parameterization 9 9 of this model. 10 10 … … 19 19 $X_{core}$ = 1 is a spherical core. 20 20 21 For a fixed shell thickness $X_{polar shell}$ = 1, to scale $t_{shell}$ 21 For a fixed shell thickness $X_{polar shell}$ = 1, to scale $t_{shell}$ 22 22 pro-rata with the radius set or constrain $X_{polar shell}$ = $X_{core}$. 23 23 … … 47 47 48 48 .. In following equation SK changed radius\_equat\_core to R_e 49 49 50 50 .. math:: 51 51 :nowrap: … … 76 76 $V = (4/3)\pi R_pR_e^2$ is the volume of the ellipsoid , $R_p$ is the 77 77 polar radius along the rotational axis of the ellipsoid, $R_e$ is the 78 equatorial radius perpendicular to the rotational axis of the ellipsoid, 79 $t_{shell}$ is the thickness of the shell at the equator, 78 equatorial radius perpendicular to the rotational axis of the ellipsoid, 79 $t_{shell}$ is the thickness of the shell at the equator, 80 80 and $\Delta \rho$ (the contrast) is the scattering length density difference, 81 81 either $(\rho_{core} - \rho_{shell})$ or $(\rho_{shell} - \rho_{solvent})$. … … 98 98 .. [#] Berr, S. *J. Phys. Chem.*, 1987, 91, 4760 99 99 100 Source101 ------102 103 `core_shell_ellipsoid.py <https://github.com/SasView/sasmodels/blob/master/sasmodels/models/core_shell_ellipsoid.py>`_104 105 `core_shell_ellipsoid.c <https://github.com/SasView/sasmodels/blob/master/sasmodels/models/core_shell_ellipsoid.c>`_106 107 100 Authorship and Verification 108 101 ---------------------------- … … 111 104 * **Last Modified by:** Richard Heenan (reparametrised model) **Date:** 2015 112 105 * **Last Reviewed by:** Steve King **Date:** March 27, 2019 113 * **Source added by :** Steve King **Date:** March 25, 2019114 106 """ 115 107
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