Changes in / [2c1bbcdd:b9f4c26] in sasmodels


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sasmodels/models
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  • sasmodels/models/gauss_lorentz_gel.py

    raa2edb2 rb8954d7  
    22This model calculates the scattering from a gel structure, 
    33but typically a physical rather than chemical network. 
    4 It is modeled as a sum of a low-q exponential decay plus 
    5 a lorentzian at higher-q values. 
     4It is modeled as a sum of a low-q exponential decay (which happens to 
     5give a functional form similar to Guinier scattering, so interpret with  
     6care) plus a Lorentzian at higher-q values. See also the gel_fit model. 
    67 
    78Definition 
    … …  
    1617$\Xi$ is the length scale of the static correlations in the gel, 
    1718which can be attributed to the "frozen-in" crosslinks. 
    18 $\xi is the dynamic correlation length, which can be attributed to the 
     19\ |xi|\ is the dynamic correlation length, which can be attributed to the 
    1920fluctuating polymer chains between crosslinks. 
    20 $IG(0)$ and $IL(0)$ are the scaling factors for each of these structures. 
     21$I_G(0)$ and $I_L(0)$ are the scaling factors for each of these structures. 
    2122Think carefully about how these map to your particular system! 
    2223 

  • sasmodels/models/gel_fit.py

    raa2edb2 rb8954d7  
    88and a longer distance (denoted here as $a2$ ) needed to account for the static 
    99accumulations of polymer pinned down by junction points or clusters of such 
    10 points. The latter is derived from a simple Guinier function. 
     10points. The latter is derived from a simple Guinier function. Compare also the  
     11gauss_lorentz_gel model. 
    1112 
    1213 
    … …  
    3334 
    3435 
    35 Reference 
    36 --------- 
     36References 
     37---------- 
    3738 
    3839Mitsuhiro Shibayama, Toyoichi Tanaka, Charles C Han, 
    … …  
    6061# pylint: disable=bad-whitespace, line-too-long 
    6162#             ["name", "units", default, [lower, upper], "type","description"], 
    62 parameters = [["guinier_scale",    "cm^{-1}",   1.7, [-inf, inf], "", "Guinier length scale"], 
    63               ["lorentzian_scale", "cm^{-1}",   3.5, [-inf, inf], "", "Lorentzian length scale"], 
     63parameters = [["guinier_scale",    "cm^-1",   1.7, [-inf, inf], "", "Guinier length scale"], 
     64              ["lorentzian_scale", "cm^-1",   3.5, [-inf, inf], "", "Lorentzian length scale"], 
    6465              ["gyration_radius",  "Ang",     104.0, [2, inf],    "", "Radius of gyration"], 
    6566              ["fractal_exp",      "",          2.0, [0, inf],    "", "Fractal exponent"], 
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