TeixeiraWater¶

Description¶

Teixeira’s model for water [1].

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.

This model (1961) has the form:

$Gamma(Q) = D*Q^2/(1 + D*Q^2*tau)$

Properties (fitting parameters)¶

Name	Default	Description
Tau	1.0	Residence time
L	1.5	Jump length

References¶

[1]	Teixeira, M.-C. Bellissent-Funel, S. H. Chen, and A. J. Dianoux. Phys. Rev. A, 31:1913–1917

Categories: FitFunctions | QuasiElastic

Source¶

Python: TeixeiraWater.py