Muonium in liquid helium isotopes
Abela R., Herlach D., Morenzoni E., Solt G., Zimmermann U., Gygax F.N., Schenck A., Eshchenko D.G., Krasnoperov E.P., Meillikhov E.E.
The asymmetry of the muonium spin precession in liquid-helium isotopes and in a solution with a small amount of 3He (0.2%) has been measured in a weak transverse magnetic field (0.4 G). The measurements were carried out in the temperature interval 0.5-2.5 K. There are essentially no muons in the free state at temperatures below 0.7 К in pure superfluid 4He or in the solution. The muons instead form muonium atoms, Mu, with electrons.