Muonium spin rotation measurements

Figure 3. Frequency spectrum derived from muonium spin rotation measurements on a singlecrystal sample of ZnO as a function of orientation (from reference 5).

The most efficient mechanism to obtain M is e capture after stopping p+ in a suitable noble gas. This technique was employed already in the discovery experiment of the muonium atom through its characteristic muon spin rotation in a magnetic field by V.W. Hughes and collaborators in 1960. There the atoms were formed in Ar gas [8], where efficiencies of 65(5)% are possible. In the most recent precision measurements of Avhfs and the muon magnetic moment... 

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