# All Models

Name Description Category Upload Date Author Score Verified
Bcc Paracrystal Definition Calculates the scattering from a **body-centered cubic lattice** with paracrystalline distortion. Thermal vibrations are considered to be negligible, and the size of the paracrysta... Paracrystal 07 Sep 2017 sasview 0
Line This model calculates intensity using simple linear function Definition The scattering intensity $I(q)$ is calculated as $$I(q) = \text{scale} (A + B \cdot q) + \text{background}$$ ... Shape-Independent 07 Sep 2017 sasview 0
Parallelepiped # parallelepiped model # Note: model title and parameter table are inserted automatically The form factor is normalized by the particle volume. For information about polarised and magnetic scatteri... Parallelepiped 07 Sep 2017 sasview 0
Guinier Definition This model fits the Guinier function $$I(q) = \text{scale} \cdot \exp{\left[ \frac{-Q^2R_g^2}{3} \right]} + \text{background}$$ to the data directly without any need for lin... Shape-Independent 07 Sep 2017 sasview 0
Cylinder # cylinder model # Note: model title and parameter table are inserted automatically For information about polarised and magnetic scattering, see the magnetism documentation. Definition ... Cylinder 07 Sep 2017 sasview 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
Pringle Definition The form factor for this bent disc is essentially that of a hyperbolic paraboloid and calculated as $$P(q) = (\Delta \rho )^2 V \int^{\pi/2}_0 d\psi \sin{\psi} sinc^2 \left( \... Cylinder 07 Sep 2017 sasview 0 Linear Pearls This model provides the form factor for N spherical pearls of radius R linearly joined by short strings (or segment length or edge separation) l (= A - 2R). A is the center-to-center pear... Sphere 07 Sep 2017 sasview 0 Polymer Micelle This model provides the form factor, P(q), for a micelle with a spherical core and Gaussian polymer chains attached to the surface, thus may be applied to block copolymer micelles. To work wel... Sphere 07 Sep 2017 sasview 0 Lorentz Lorentz (Ornstein-Zernicke Model) Definition The Ornstein-Zernicke model is defined by$$ I(q)=\frac{\text{scale}}{1+(qL)^2}+\text{background} $$The parameter L is the screening len... Shape-Independent 07 Sep 2017 sasview 0 Fcc Paracrystal #fcc paracrystal model #note model title and parameter table are automatically inserted #note - calculation requires double precision Calculates the scattering from a **face-centered cubic lattice*... Paracrystal 07 Sep 2017 sasview 0 Raspberry Definition The figure below shows a schematic of a large droplet surrounded by several smaller particles forming a structure similar to that of Pickering emulsions. Schematic of the... Sphere 07 Sep 2017 sasview 0 Onion This model provides the form factor, P(q), for a multi-shell sphere where the scattering length density (SLD) of each shell is described by an exponential, linear, or constant function. The form ... Sphere 07 Sep 2017 sasview 0 Power Law #power_law model #conversion of PowerLawAbsModel.py #converted by Steve King, Dec 2015 This model calculates a simple power law with a flat background. Definition$$ I(q) = \text{scale... Shape-Independent 07 Sep 2017 sasview 0
Squarewell # Note: model title and parameter table are inserted automatically This calculates the interparticle structure factor for a square well fluid spherical particles. The mean spherical approximation (... Structure Factor 07 Sep 2017 sasview 0
Gel Fit *This model was implemented by an interested user!* Unlike a concentrated polymer solution, the fine-scale polymer distribution in a gel involves at least two characteristic length scales, a sho... Shape-Independent 07 Sep 2017 sasview 0
Peak Lorentz This model describes a Lorentzian shaped peak on a flat background. Definition The scattering intensity $I(q)$ is calculated as $$I(q) = \frac{scale}{\bigl(1+\bigl(\frac{q-q_0}{B}\big... Shape-Independent 07 Sep 2017 sasview 0 Hardsphere # Note: model title and parameter table are inserted automatically Structure Factor 07 Sep 2017 sasview 0 Core Shell Parallelepiped Definition Calculates the form factor for a rectangular solid with a core-shell structure. The thickness and the scattering length density of the shell or "rim" can be different on each (pair... Parallelepiped 07 Sep 2017 sasview 0 Correlation Length #correlation length model # Note: model title and parameter table are inserted automatically Definition The scattering intensity I(q) is calculated as$$ I(Q) = \frac{A}{Q^n} + \frac{C}{1 ... Shape-Independent 07 Sep 2017 sasview 0

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