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StretchedKT

Description

For observation of muon spin relaxation MuSR spectra with lineshapes lying between a Guassian and a Lorentzian,

\[A(t)=A_0\left(\frac{1}{3}+\frac{2}{3}\left(1-(\sigma t)^\beta\right)e^{-\frac{(\sigma t)^\beta}{\beta}}\right)\]

where,

\(\sigma\) is KuboToyabe decay rate,

\(A_0\) is the amplitude,

\(\beta\) is the stretching exponential and it ranges from 1 (neglible nuclear field) and 2 (strong nuclear field).

Properties (fitting parameters)

Name	Default	Description
A0	1.0
Beta	1.0
Sigma	0.1

(Source code, png, hires.png, pdf)

References

[1] Crook et al, J. Phys.: Condens. Matter 9 1149-1158 (1997).

[2] Lord J.S., J. Phys.: Conf. Ser. 17 81 (2005).

Categories: FitFunctions | Muon\MuonGeneric

Source

Python: StretchedKT.py