| Polymer Excl Volume |
This model describes the scattering from polymer chains subject to excluded volume effects and has been used as a template for describing mass fractals.
Definition
The form factor was orig... |
Shape-Independent |
07 Sep 2017 |
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| Mass Fractal |
Calculates the scattering from fractal-like aggregates based on the Mildner reference.
Definition
The scattering intensity $I(q)$ is calculated as
$$ I(q) = scale \times P(q)S(q) + bac... |
Shape-Independent |
07 Sep 2017 |
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| Flexible Cylinder |
This model provides the form factor, $P(q)$, for a flexible cylinder where the form factor is normalized by the volume of the cylinder. **Inter-cylinder interactions are NOT provided for.**
$$ ... |
Cylinder |
07 Sep 2017 |
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| Be Polyelectrolyte |
.. note:: Please read the Validation section below.
Definition
This model calculates the structure factor of a polyelectrolyte solution with the RPA expression derived by Borue and Erukhimovi... |
Shape-Independent |
07 Sep 2017 |
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| Lamellar Stack Caille |
This model provides the scattering intensity, $I(q) = P(q) S(q)$, for a lamellar phase where a random distribution in solution are assumed. Here a Caille $S(q)$ is used for the lamellar stacks.
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Lamellae |
07 Sep 2017 |
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| 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 |
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| 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 |
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| Flexible Cylinder Elliptical |
This model calculates the form factor for a flexible cylinder with an elliptical cross section and a uniform scattering length density. The non-negligible diameter of the cylinder is included by ac... |
Cylinder |
07 Sep 2017 |
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| Poly Gauss Coil |
#poly_gauss_coil model #conversion of Poly_GaussCoil.py #converted by Steve King, Mar 2016 This empirical model describes the scattering from *polydisperse* polymer chains in theta solvents or poly... |
Shape-Independent |
07 Sep 2017 |
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| 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 |
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| Core Shell Ellipsoid |
Definition
Parameters for this model are the core axial ratio $X_{core}$ and a shell thickness $t_{shell}$, which are more often what we would like to determine and make the model better beha... |
Ellipsoid |
07 Sep 2017 |
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| Mass Surface Fractal |
A number of natural and commercial processes form high-surface area materials as a result of the vapour-phase aggregation of primary particles. Examples of such materials include soots, aerosols... |
Shape-Independent |
07 Sep 2017 |
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| Rpa |
Definition
Calculates the macroscopic scattering intensity for a multi-component homogeneous mixture of polymers using the Random Phase Approximation. This general formalism contains 10 speci... |
Shape-Independent |
07 Sep 2017 |
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| Stacked Disks |
Definition
This model provides the form factor, $P(q)$, for stacked discs (tactoids) with a core/layer structure which is constructed itself as $P(q) S(Q)$ multiplying a $P(q)$ for individual... |
Cylinder |
07 Sep 2017 |
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| Hayter Msa |
# Note: model title and parameter table are inserted automatically Calculates the interparticle structure factor for a system of charged, spheroidal, objects in a dielectric medium [1,2]. When comb... |
Structure Factor |
07 Sep 2017 |
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| Broad Peak |
Definition
This model calculates an empirical functional form for SAS data characterized by a broad scattering peak. Many SAS spectra are characterized by a broad peak even though they are fr... |
Shape-Independent |
07 Sep 2017 |
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| Multilayer Vesicle |
Definition
This model is a trivial extension of the core_shell_sphere function where the core is filled with solvent and is surrounded by $N$ shells of material (such as lipids) interleaved w... |
Sphere |
07 Sep 2017 |
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| Stickyhardsphere |
# Note: model title and parameter table are inserted automatically Calculates the interparticle structure factor for a hard sphere fluid with a narrow, attractive, potential well. Unlike the `squar... |
Structure Factor |
07 Sep 2017 |
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| Spherical Sld |
Definition
Similarly to the onion, this model provides the form factor, $P(q)$, for a multi-shell sphere, where the interface between the each neighboring shells can be described by the error... |
Sphere |
07 Sep 2017 |
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| 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 |
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