SIMULTANEOUS OBSERVATION OF MUONIUM AND MULTIPLE FREE-RADICALS IN MUON-IMPLANTED C-70

Positive muons injected into solid C70 form a vacuumlike muonium (Mu) state with a 25% probability. This state is attributed to muons inside the C70 cage (C70:MU). In addition, three different types of muonated free radicals, distinguishable by their hyperfine coupling constants, are observed. These radicals are attributed to muonium addition on th e outside of the C70 molecule at different sites. The hyperfine parame ters of these radicals reflect the different degrees of delocalization of the unpaired electron. The temperature dependence of the depolariz ation rates yields information on the dynamics of the C70 molecules.