Changeset c1e44e5 in sasmodels for sasmodels/models/hardsphere.py
- Timestamp:
- Mar 30, 2019 1:59:45 AM (5 years ago)
- Branches:
- master
- Children:
- a42b091
- Parents:
- 663d2a8
- File:
-
- 1 edited
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sasmodels/models/hardsphere.py
r5f3c534 rc1e44e5 3 3 Calculates the interparticle structure factor for monodisperse 4 4 spherical particles interacting through hard sphere (excluded volume) 5 interactions. This $S(q)$ may also be a reasonable approximation for 6 other particle shapes that freely rotate (but see the note below), 5 interactions. This $S(q)$ may also be a reasonable approximation for 6 other particle shapes that freely rotate (but see the note below), 7 7 and for moderately polydisperse systems. 8 8 9 9 .. note:: 10 10 11 This routine is intended for uncharged particles! For charged 11 This routine is intended for uncharged particles! For charged 12 12 particles try using the :ref:`hayter-msa` $S(q)$ instead. 13 13 14 14 .. note:: 15 15 16 Earlier versions of SasView did not incorporate the so-called 17 $\beta(q)$ ("beta") correction [1] for polydispersity and non-sphericity. 16 Earlier versions of SasView did not incorporate the so-called 17 $\beta(q)$ ("beta") correction [1] for polydispersity and non-sphericity. 18 18 This is only available in SasView versions 4.2.2 and higher. 19 19 … … 25 25 26 26 For numerical stability the computation uses a Taylor series expansion 27 at very small $qR$, but there may be a very minor glitch at the 27 at very small $qR$, but there may be a very minor glitch at the 28 28 transition point in some circumstances. 29 29 30 This S(q) uses the Percus-Yevick closure relationship [2] where the 30 This S(q) uses the Percus-Yevick closure relationship [2] where the 31 31 interparticle potential $U(r)$ is 32 32 … … 54 54 .. [#] J K Percus, J Yevick, *J. Phys. Rev.*, 110, (1958) 1 55 55 56 Source57 ------58 59 `hardsphere.py <https://github.com/SasView/sasmodels/blob/master/sasmodels/models/hardsphere.py>`_60 61 56 Authorship and Verification 62 57 ---------------------------- 63 58 64 * **Author:** 65 * **Last Modified by:** 66 * **Last Reviewed by:** 67 * **Source added by :** Steve King **Date:** March 25, 2019 59 * **Author:** 60 * **Last Modified by:** 61 * **Last Reviewed by:** 68 62 """ 69 63
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