On the anomalous muonium hyperfine field in silicon

The muon spin precession in the axial-symmetric muonium Mubc was studied in a magnetic field applied along the initial muon polarization which was, in turn, parallel to the [111] axis of a silicon single crystal. Hyperfine fields were measured at temperature T = 12 K. The transversal parameter is in good agreement with work by Blazey et al 1983 Phys. Rev. B 27 15, but obtained in this work is less than the value published by Blazey et al by 0.29 MHz. This discrepancy is attributed to the accuracy of determination of the angle between the [111] axis and the magnetic field direction.