Abstract
The diffusion of hydrogen molecules in hexagonal D2O ice (Ih) in the temperature range of 25–60 K was investigated by quasielastic neutron scattering. The observed spectra consist of a narrow elastic peak and a broad quasielastic component. The single-particle diffusion coefficient for H2 in D2O ice was obtained using a simple model of diffusion and is remarkably high—comparable to the coefficient of H2 in a liquid.
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