| RPA models |
Calculates the macroscopic scattering intensity for a multi-component homogeneous mixture of polymers using the Random Phase Approximation. This general formalism contains 10 specific cases
Case... |
Shape-Independent |
15 Sep 2016 |
butler |
0 |
|
| star_polymer_v2 |
Reparametrised version, fits Rg not Rg^2^
Documentation corrected, see ticket #962, with grateful thanks to Ziang Li for pointing out the issues.
The models is still noisy at very small Q when Rg... |
Shape-Independent |
22 May 2017 |
richardh |
0 |
|
| Porod |
This model is a special case of the power law model, deriving its special name from the Porod Law which it models, where the power law exponent is fixed to -4.
$$ I(q) = C/q^4 + Background
$$
W... |
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 |
|
| 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
$$ \begin{align*} I(q) = \... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Two Lorentzian |
Definition
The scattering intensity $I(q)$ is calculated as
$$ 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 |
|
| 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 |
|
| 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 |
sasview |
0 |
|
| Guinier Porod |
Calculates the scattering for a generalized Guinier/power law object. This is an empirical model that can be used to determine the size and dimensionality of scattering objects, including asymmetri... |
Shape-Independent |
15 Sep 2016 |
sasview |
0 |
|
| 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 |
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 |
|
| 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 |
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 |
|
| 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 |
|
| 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 |
sasview |
0 |
|
| 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 |
sasview |
0 |
|
| 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 |
sasview |
0 |
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