# Shape-Independent

Name Description Category Upload Date Author Score Verified
Guinier Definition This model fits the Guinier function $$I(q) = \text{scale} \cdot \exp{\left[ \frac{-Q^2 R_g^2 }{3} \right]} + \text{background}$$ to the data directly without any need for l... Shape-Independent 07 Sep 2017 sasview 0
Surface Fractal This model calculates the scattering from fractal-like aggregates based on the Mildner reference. Definition The scattering intensity $I(q)$ is calculated as \begin{align*} I(q) = \... Shape-Independent 07 Sep 2017 sasview 0 Star Polymer Definition Calcuates the scattering from a simple star polymer with f equal Gaussian coil arms. A star being defined as a branched polymer with all the branches emanating from a common centra... Shape-Independent 07 Sep 2017 sasview 0 Two Lorentzian Definition The scattering intensity I(q) is calculated as I(q) = \frac{A}{1 +(Q\xi_1)^n} + \frac{C}{1 +(Q\xi_2)^m} + \text{B} $$where A = Lorentzian scale factor #1, C = Lorent... Shape-Independent 07 Sep 2017 sasview 0 Dab Calculates the scattering from a randomly distributed, two-phase system based on the Debye-Anderson-Brumberger (DAB) model for such systems. The two-phase system is characterized by a single length... Shape-Independent 07 Sep 2017 sasview 0 broad-peak (SASfit) This file has been automatically generated by sasfit_convert and manually edited by Wojciech Potrzebowski, ESS on 2017-12-05. The model calculates an empirical functional form for SAS data chara... Shape-Independent 07 Dec 2017 wojciechpotrzebowski 0 test_cfile testing c file Shape-Independent 16 Apr 2018 wojciechpotrzebowski 0 Star Polymer w/ Excluded Volume This model describes scattering from a star-branched polymer where the arms of the polymer may have excluded volume, i.e., they need not be Gaussian chains. Under this model, the form factor of ... Shape-Independent 22 Aug 2018 mjahore 0 Two Power Law Definition The scattering intensity I(q) is calculated as$$ I(q) = \begin{cases} A q^{-m1} + \text{background} & q <= q_c \\ C q^{-m2} + \text{background} & q > q_c \end{cases} $$whe... Shape-Independent 07 Sep 2017 sasview 0 Unified Power Rg Definition This model employs the empirical multiple level unified Exponential/Power-law fit method developed by Beaucage. Four functions are included so that 1, 2, 3, or 4 levels can be used... Shape-Independent 07 Sep 2017 sasview 0 Fractal Core Shell Definition Calculates the scattering from a fractal structure with a primary building block of core-shell spheres, as opposed to just homogeneous spheres in the fractal model. It is an extension... Shape-Independent 07 Sep 2017 sasview 0 Correlation Length #correlation length model # Note: model title and parameter table are inserted automatically Definition The scattering intensity I(q) is calculated as$$ I(Q) = \frac{A}{Q^n} + \frac{C}{1 ... Shape-Independent 07 Sep 2017 sasview 0
Mono Gauss Coil #mono_gauss_coil model #conversion of DebyeModel.py #converted by Steve King, Mar 2016 This Debye Gaussian coil model strictly describes the scattering from *monodisperse* polymer chains in theta s... Shape-Independent 07 Sep 2017 sasview 0
Gauss Lorentz Gel This model calculates the scattering from a gel structure, but typically a physical rather than chemical network. It is modeled as a sum of a low-q exponential decay (which happens to give a functi... Shape-Independent 07 Sep 2017 sasview 0
2 Layer General Guinier Porod Implementation of the 2 layer General guinier porod model described in B. Hammouda, "A new Guinier–Porod model", Journal of Applied Crystallography, 43(4), 716, 2010 Shape-Independent 03 Feb 2020 dfsunday 0
Exponential Flexible exponential model with a flat background. DEFINITION This model calculates a variety of exponential functions. The scattered intensity $I(q)$ is calculated as \$I(q) = \text{sc... Shape-Independent 07 Mar 2020 smk78 0
Binary Blend Two-component RPA model with a flat background. DEFINITION This model calculates the scattering from a two component polymer blend using the Random Phase Approximation (RPA). The two polymer... Shape-Independent 07 May 2020 smk78 0
Peak Voigt This model describes a pseudo-Voigt shaped peak on a flat background. Definition This pseudo-Voigt peak function is a weighted linear summation of Lorentzian (L) and Gaussian (G) peak shapes. T... Shape-Independent 24 Jun 2020 smk78 0

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