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Fick Diffusion¶
Description¶
Models the Q dependence of the QENS line width (Gamma (hwhm)), diffusion coefficients (D), residence times (tau) and jump lengths (l) to extract the associated long range diffusive motions of molecules. Fick’s law for diffusion has the form:
\[Gamma(Q) = D \cdot Q^{2},\]
where \(D=\langle l^{2} \rangle \cdot \frac{Q^2}{6} \cdot tau\)
Properties (fitting parameters)¶
Name |
Default |
Description |
|---|---|---|
D |
1.0 |
Diffusion constant |
Categories: FitFunctions | QuasiElastic
Source¶
Python: FickDiffusion.py