Quasielastic neutron scattering was used to study atomic dynamics in liquid Cu. At small wave numbers q the intermediate scattering function was dominated by incoherent scattering contributions. From the decay of the quasielastic signal, self-diffusion coefficients D were obtained on an absolute scale. In a temperature range from 1370 to 1620K, D values exhibit an Arrhenius-type temperature dependence and were significantly smaller than those from previous tracer experiments that were hampered by convective flow.
Self-Diffusion in Liquid Copper as Seen by Quasielastic Neutron Scattering. A.Meyer: Physical Review B, 2010, 81, 012102