H. Neumann et Jb. Suck, Diffusion of Ni in molten NiGe: A quasielastic neutron scattering investigation using the isotopic substitution method, J NON-CRYST, 250, 1999, pp. 368-372
Quasielastic neutron scattering experiments on molten Ni0.15Ge0.85 were don
e using the time-of-flight spectrometer IN5 of the ILL in Grenoble. Neglect
ing the small coherent scattering part of the Ni-Ni correlation and the inc
oherent Ge-scattering, the three total dynamic structure factors are used t
o determine the incoherent part of the Ni-scattering alone. From the full-w
idth at half maximum of the Lorentzian shape quasielastic line we have calc
ulated the selfdiffusion coefficient of Ni, D-Ni = (5.5 +/- 0.2) X 10(-5) c
m(2) s(-1). The Einstein-Sutherland equation can be successfully applied in
this case. (C) 1999 Elsevier Science B.V. All rights reserved.