Changes in sasmodels/models/flexible_cylinder.py [598a354:db1d9d5] in sasmodels
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
sasmodels/models/flexible_cylinder.py
r598a354 rdb1d9d5 33 33 and solvent respectively. 34 34 35 Our model uses the form factor calculations i mplemented in a c-library provided36 by the NIST Center for Neutron Research (Kline, 2006). This states:35 Our model uses the form factor calculations in reference [1] as implemented in a 36 c-library provided by the NIST Center for Neutron Research (Kline, 2006). This states: 37 37 38 38 'Method 3 With Excluded Volume' is used. … … 41 41 pseudocontinuous limit. 42 42 See equations (13,26-27) in the original reference for the details. 43 44 .. note:: 45 46 There are several typos in the original reference that have been corrected 47 by WRC [2]. Details of the corrections are in the reference below. Most notably 48 49 - Equation (13): the term $(1 - w(QR))$ should swap position with $w(QR)$ 50 51 - Equations (23) and (24) are incorrect; WRC has entered these into 52 Mathematica and solved analytically. The results were then converted to 53 code. 54 55 - Equation (27) should be $q0 = max(a3/(Rg^2)^{1/2},3)$ instead of 56 $max(a3*b(Rg^2)^{1/2},3)$ 57 58 - The scattering function is negative for a range of parameter values and 59 q-values that are experimentally accessible. A correction function has been 60 added to give the proper behavior. 61 62 63 **This is a model with complex behaviour depending on the ratio of** $L/b$ **and the 64 reader is strongly encouraged to read reference [1] before use.** 43 65 44 66 References … … 58 80 `flexible_cylinder.c <https://github.com/SasView/sasmodels/blob/master/sasmodels/models/flexible_cylinder.c>`_ 59 81 82 `wrc_cyl.c <https://github.com/SasView/sasmodels/blob/master/sasmodels/models/lib/wrc_cyl.c>`_ 83 60 84 Authorship and Verification 61 85 ---------------------------- 62 86 63 * **Author:** 64 * **Last Modified by:** 65 * **Last Reviewed by:** 87 * **Author:** 88 * **Last Modified by:** 89 * **Last Reviewed by:** Steve King **Date:** March 26, 2019 66 90 * **Source added by :** Steve King **Date:** March 25, 2019 67 91 """
Note: See TracChangeset
for help on using the changeset viewer.