Models the Q dependence of the QENS line width (Gamma (hwhm)), diffusion coefficients (D), residence times (tau) and jump lengths (length) to extract the associated long range diffusive motions of molecules.
The Chudley-Elliot Jump diffusion model [1] has the form:
Units of are inverse units of
.
Units of are
if units of
are ps.
Alternatively, units of
are
if units of
are ns.
Name | Default | Description |
---|---|---|
Tau | 1.0 | Residence time |
L | 1.5 | Jump length |
[1] | C T Chudley and R J Elliott 1961 Proc. Phys. Soc. 77 353 |
Categories: FitFunctions | QuasiElastic
Python: ChudleyElliot.py (last modified: 2019-02-08)