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Keren¶
Description¶
Keren’s generalization of the Abragam relaxation function to a longitudinal field, for fitting the time-dependent muon polarization.
The function is derived in *Phys Rev B, vol. 50, 14, 10039-42 (1994)* and is given by
where the relaxation rate \(\Gamma(t)\) is
\(A = P_z(0)\) is the polarization at time zero, \(\nu\) is the fluctuation rate (inverse correlation time), \(\Delta\) is the distribution width of the local fields and \(\omega_L\) is the Larmor frequency (longitudinal field times muon gyromagnetic ratio).
Properties (fitting parameters)¶
Name |
Default |
Description |
---|---|---|
A |
1.0 |
Polarization at time zero |
Delta |
0.2 |
Distribution width of local fields (MHz) |
Field |
50.0 |
Longitudinal field (Gauss) |
Fluct |
0.2 |
Hopping rate (inverse correlation time, MHz) |
Categories: FitFunctions | Muon\MuonSpecific
Source¶
C++ header: Keren.h
C++ source: Keren.cpp