Paschen-Bach effect for muonium atom in crystalline nitrogen
Storchak V. G. , Grebinnik V. G. , Duginov V. N., Kirillov B. F., Pirogov A. V., Ponomarev A. N. , Zhukov V. A. , Lazarev A. B., Shilov S. N.
The polarization of muons is measured as a function of longitudinal magnetic field strength in solid nitrogen. It is shown that the hyperfine interaction energy of a muonium atom in nitrogen is smaller than the vacuum value by a factor of two. In a weak field the polarization of muons is less than half the value, which is evidently due to the nuclear hyperfine interaction.