Abstract
The large incoherent scattering cross section of the proton makes it a good candidate for quasi-elastic neutron scattering investigations. This technique is particularly well adapted for the study of fast proton conductors since the characteristic time of proton diffusion motion is in the time scale explored by the time-of-flight and backscattering spectrometers installed on the cold source of the high flux reactor of the Institut Laue-Langevin. Through different examples of hydrated minerals like clays, HUP, NaUP, H and Na V 2O 5 gels, it is shown how the dependence on momentum and energy transfer of the scattering law allows one to determine the proton dynamics, specially the residence time and jump length of the motion associated with the conductivity.
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