This chapter describes the practical aspects of quasielastic neutron scattering experiments and the necessary processing of raw data, including tips and tricks. The sample thickness has to be chosen as a compromise between sufficiently high scattering intensity and sufficiently low multiple scattering. For the background subtraction, self-shielding has to be taken into account, and then resolution corrections have to be performed. For complex situations with the superposition of several scattering components, a simultaneous fit enables the extraction of desired information from the data. Another problem is multiple scattering; corresponding correction strategies are outlined. Finally, the two spectrometer types most commonly used for quaisielastic neutron scattering experiments — time-of-flight instruments and backscattering instruments — are described in some detail. As a related method, quasielastic Mössbauer spectroscopy is briefly mentioned.
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