COUPLING OF MU-MESONIC AND ELECTRONIC HYPERFINESTRUCTURE IN AN ATOM

In calculating the hyperfinestructure interaction between a μ-mesonic atom and a valence electron, the former can be treated as a pseudonucleus of charge (Z-1), since its radius is very small as compared to the one of the electronic wave function. The consequences of this concept as well as corrections to it are discussed in detail. The experimental possibility of an rf-spectroscopy of this hyperfinestructure is pointed out. It bases on the destruction of the β-decay asymmetry of stopped polarized μ-mesons at resonance. Special attention is payed to the one-electron system (He++ μ-)e-. © 1969 Springer-Verlag.