.. index:: FmuF
A fitting function for muon-fluorine bonds in ionic crystals.
A(t)=A_0e^{-\frac{(\sigma t)^2}{2}}e^{-\lambda t}G(t)
where,
\lambda is the exponential decay rate,
\sigma is the Gaussian decay rate,
\omega_D (rad/s) is the dipolar interaction angular frequency,
and the expression for G(t) and \omega_D are given by
G(t)=\frac{1}{6}\left[3+\cos(\sqrt{3} \omega_\text{D} t)+\left(1-\frac{1}{\sqrt{3}}\right)\cos(\frac{3-\sqrt{3}}{2}\omega_\text{D} t)+\left(1+\frac{1}{\sqrt{3}}\right)\cos(\frac{3+\sqrt{3}}{2}\omega_\text{D} t)\right]
and
\omega_D = 2\pi\nu
where \nu (MHz) is the dipolar interaction frequency.
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[1] J.H.Brewer et al., PRB 33 11 (1986).
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