Messung der quasi-elastischen Neutronenstreuung in Glyzerin mit einem hochauflösenden Kristallspektrometer
A new neutron crystal spectrometer with an energy resolution of 6 · 10−7 eV was installed at the Munich reactor. The high energy resolution is based on the backscattering of neutrons on silicon single crystals. The energy of the neutrons striking the glycerol sample is varied by Doppler shifting. With this spectrometer the quasielastic line broadening in glycerol was investigated at constant momentum transfer (κ=1.4 ± 0.25) Å−1 as a function of temperature. The diffusion constants deduced from the experiment are in the order of 10−7 cm2/s to 5 · 10−9 cm2/s.