| 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 Erukhimovich. Note however that the fitting procedure here do… |
| 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.
Definition
The scattering intensity $I(q)$ is … |
| 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 central (in the case of this model) point. It is derived … |
| 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 scale, the correlation length, which is a measure o… |
| 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 accounting for excluded volume interactions within the… |
| 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 polymer melts, assuming a Schulz-Zimm type molecular wei… |
| 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 of the well known Teixeira[#Teixeira1988]_ fractal … |
| 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 behaved, particularly when polydispersity is applied, th… |
| 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, and fume or pyrogenic silicas. These are all chara… |
| 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 0 below (the most common use case) is t… |
| 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 core/layer disks by a structure factor $S(q)$ propo… |
| 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 combined with an appropriate form factor $P(q)$, this al… |
| 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 from amorphous soft materials. For example, soft syste… |
| 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 with $N - 1$ layers of solvent. For $N = 1$, this ret… |
| 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 `squarewell` model, here a perturbative solution of the Pe… |