Changeset 5702f52 in sasmodels

Timestamp:

Apr 5, 2017 12:59:48 PM (8 years ago)

Author:

butler

Branches:

master, core_shell_microgels, costrafo411, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

650c6d2

Parents:

3ad7978

Message:

Fix parameter limits in hayter_msa on charge (max = 200 not inf) and
salt concentration (min = 0 not -inf) to help diminish instabilities

File:

• sasmodels/models/hayter_msa.py (modified) (1 diff)

sasmodels/models/hayter_msa.py

@@ -74 +74 @@
     ["radius_effective", "Ang", 20.75,   [0, inf],    "volume", "effective radius of charged sphere"],
     ["volfraction",   "None",     0.0192, [0, 0.74],   "", "volume fraction of spheres"],
-    ["charge",        "e",   19.0,    [0, inf],    "", "charge on sphere (in electrons)"],
+    ["charge",        "e",   19.0,    [0, 200],    "", "charge on sphere (in electrons)"],
     ["temperature",   "K",  318.16,   [0, 450],    "", "temperature, in Kelvin, for Debye length calculation"],
-    ["concentration_salt",      "M",    0.0,    [-inf, inf], "", "conc of salt, moles/litre, 1:1 electolyte, for Debye length"],
+    ["concentration_salt",      "M",    0.0,    [0, inf], "", "conc of salt, moles/litre, 1:1 electolyte, for Debye length"],
     ["dielectconst",  "None",    71.08,   [-inf, inf], "", "dielectric constant (relative permittivity) of solvent, default water, for Debye length"]
     ]