Nuclear resonant scattering of synchrotron radiation on molecular probes has been employed to study the dynamics of a glass former. Incoherent and coherent scattering have been investigated in theory and applied in experiment in the static case and in the presence of relaxation. The influence of translational and spin relaxation in the pico-to-microsecond time range on relevant observables has been characterized. The measured temperature dependence of these observables gives then information about the liquid-to-glass transition. In particular the combination of coherent and incoherent scattering allowed here to separate translational and rotational dynamics.
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