DIFFUSION OF HYDROGEN IN DISORDERED ALLOYS

The diffusion of hydrogen in binary transition metal glasses has been studied by nuclear magnetic relaxation, neutron scattering and muon spin rotation. In each case the measured quantities depend on a time-dependent correlation function of the random fluctuations of the atomic positions or local magnetic fields. Appropriate correlation functions can be derived by computer simulation and particular attention is paid to a computer model based on a distribution of diffusion jump rates. The extent to which this model may account for the results of the relaxation and neutron scattering experiments is discussed.