Hall-Ross¶

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.

The Hall-Ross Jump diffusion model [1] has the form:

$Gamma(Q) = (1-exp(-l*Q^2))/tau$

Properties (fitting parameters)¶

Name	Default	Description
Tau	1.0	Residence time
L	0.2	Jump length

References¶

[1]	P L Hall & D K Ross Mol Phys 36 1549 (1978)

Categories: FitFunctions | QuasiElastic

Source¶

Python: HallRoss.py