| 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 |
|
| Gaussian Peak |
Definition
This model describes a Gaussian shaped peak on a flat background
$$ I(q) = (\text{scale}) \exp\left[ -\tfrac12 (q-q_0)^2 / \sigma^2 \right] + \text{background}
$$
with the ... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Teubner Strey |
Definition
This model calculates the scattered intensity of a two-component system using the Teubner-Strey model. Unlike `dab` this function generates a peak. A two-phase material can be char... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Fractal |
Definition
This model calculates the scattering from fractal-like aggregates of spherical building blocks according the following equation:
$$ I(q) = \phi\ V_\text{block} (\rho_\text{block} ... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Correlation Length |
#correlation length model # Note: model title and parameter table are inserted automatically Definition
The scattering intensity I(q) is calculated as
$$ I(Q) = \frac{A}{Q^n} + \frac{C}{1 ... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Peak Lorentz |
This model describes a Lorentzian shaped peak on a flat background.
Definition
The scattering intensity $I(q)$ is calculated as
$$ I(q) = \frac{scale}{\bigl(1+\bigl(\frac{q-q_0}{B}\big... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Gel Fit |
*This model was implemented by an interested user!*
Unlike a concentrated polymer solution, the fine-scale polymer distribution in a gel involves at least two characteristic length scales, a sho... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Power Law |
#power_law model #conversion of PowerLawAbsModel.py #converted by Steve King, Dec 2015
This model calculates a simple power law with a flat background.
Definition
$$ I(q) = \text{scale... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| 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 |
|
| Spinodal |
Definition
This model calculates the SAS signal of a phase separating system undergoing spinodal decomposition. The scattering intensity $I(q)$ is calculated as
$$ I(q) = I_{max}\frac{(1+\... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Guinier |
Definition
This model fits the Guinier function
$$ I(q) = \text{scale} \cdot \exp{\left[ \frac{-Q^2 R_g^2 }{3} \right]} + \text{background}
$$
to the data directly without any need for l... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| Line |
This model calculates intensity using simple linear function
Definition
The scattering intensity $I(q)$ is calculated as
$$ I(q) = \text{scale} (A + B \cdot q) + \text{background}
$$
... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|
| 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 |
|
| 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 |
|
| 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-polymer RPA model with a flat background.
Definition
------------
This model calculates the scattering from a two polymer blend using the Random Phase Approximation (RPA).
This is a rev... |
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 |
|
| Rpa |
.. warning:: This model is not functioning correctly in SasView and it appears it has not done so for some time. Whilst the problem is investigated, a workaround for Case ... |
Shape-Independent |
07 Sep 2017 |
sasview |
0 |
|