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DrPaulSharp merged 1 commit into from
Mar 31, 2026
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Update Corfunc parameter definitions #3908

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32 changes: 26 additions & 6 deletions src/sas/qtgui/Perspectives/Corfunc/media/corfunc-technical.rst
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Expand Up @@ -174,19 +174,39 @@ as shown below.

**It is for the user to decide if this interpretation has any relevance to their system!**

The structural parameters extracted are:
The structural parameters extracted are [1]:

* Long Period :math:`= L_p`
* Average Hard Block Thickness :math:`= L_c`
* Average Hard (/Short) Block Thickness :math:`= L_c`
* Average Core Thickness :math:`= D_0`
* Average Interface Thickness :math:`= D_{tr}`
* Eekhaut Polydispersity :math:`= \Gamma_{\text{min}}/\Gamma_{\text{max}}`
* Stribeck Polydispersity :math:`= \frac{L_c}{(L_c - L_p)\Gamma_{\text{max}}}`
* Local Crystallinity :math:`= L_c/L_p`
* Eekhaut Polydispersity [2] :math:`= \Gamma_{\text{min}}/\Gamma_{\text{max}}`
* Stribeck Polydispersity [3] :math:`= \frac{L_c}{(L_c - L_p)\Gamma_{\text{max}}}`
* Local Crystallinity :math:`=` Hard Block Volume Fraction :math:`= L_c/L_p`

which lead to:

* Average Soft Block Thickness :math:`= L_p - L_c = L_a`
* Average Soft (/Long) Block Thickness :math:`= L_p - L_c = L_a`
* Average Chord Length :math:`= ((1/L_c) + (1/L_a))^{-1}`
* Average Crystalline Chord Length :math:`= \frac{L_a L_c}{\Phi_{\text{c}} (L_c + L_a)}`
* Non-Ideality :math:`= \left(\frac{L_p – L_p*}{L_p}\right)^2`

In normal circumstances it is expected that Lc < La.


References
----------

.. [1]
Strobl, G. R.; Schneider, M. *J. Polym. Sci.* (1980), 18, 1343-1359

.. [2]
:ref:`FDR` (PDF format)

.. [3]
Stribeck, N. *X-Ray Scattering of Soft Matter*, Springer. Berlin (2007), 138-161


.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ

.. note:: This document was last modified by Sujaya Shrestha, 25/03/2026.
8 changes: 8 additions & 0 deletions src/sas/qtgui/Perspectives/Corfunc/media/corfunc-theory.rst
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@@ -1,6 +1,9 @@
.. _corfunc-theory:


.. note::
For an explanation of the parameters in the Corfunc window, see the :ref:`corfunc-technical` documentation.


Correlation Function Theory
===========================
Expand Down Expand Up @@ -370,3 +373,8 @@ References
Stribeck, N. *X-Ray Scattering of Soft Matter*, Springer. Berlin (2007), 138-161

:ref:`FDR` (PDF format)


.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ

.. note:: This document was last modified by Sujaya Shrestha, 25/03/2026.
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