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Zero-Field Muon Depolarisation in Metallic Glass Hydrides*

muon depolarisation rate is found to be due to the coupling of the muon spins and hydrogen nuclear moments. Muon motion is evident over the entire temperature range investigated, 10 K to 340 K. Above about 200 K the correlation time of the dipolar field at the muon has the same activation energy as the hydrogen jump rate obtained from the nuclear magnetic relaxation. Below this temperature the interval between hops of the hydrogen atoms is apparently much longer than this correlation time.