Changeset b4679de in sasview for sansmodels/src/sans/models/LamellarModel.py

Timestamp:

Aug 4, 2009 1:32:38 PM (15 years ago)

Author:

Jae Cho <jhjcho@…>

Branches:

master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, costrafo411, magnetic_scatt, release-4.1.1, release-4.1.2, release-4.2.2, release_4.0.1, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload

Children:

fbe5d3e

Parents:

8e91f01

Message:

added 2d and model descpt + correction on polydisp. para.

File:

• sansmodels/src/sans/models/LamellarModel.py (modified) (2 diffs)

sansmodels/src/sans/models/LamellarModel.py

@@ -50 +50 @@
         self.name = "LamellarModel"
         ## Model description
-        self.description =""" I(q)= 2*pi*P(q)/(delta *q^(2))
-                where:
-                P(q)=2*(contrast/q)^(2)*(1-cos(q*delta)*e^(1/2*(q*sigma)^(2))"""
+        self.description ="""[Dilute Lamellar Form Factor](from a lyotropic lamellar phase)
+                I(q)= 2*pi*P(q)/(delta *q^(2)), where
+                P(q)=2*(contrast/q)^(2)*(1-cos(q*delta)
+                *e^(1/2*(q*sigma)^(2)).
+                delta = bilayer thickness
+                sigma = variation in bilayer thickness
+                = delta*polydispersity
+                contrast = SLD_solvent - SLD_bilayer
+                Note: the polydispersity in delta is included."""
        
                 ## Parameter details [units, min, max]
@@ -63 +69 @@
 
                 ## fittable parameters
-        self.fixed=['delta.width']
+        self.fixed=[]
         
         ## parameters with orientation