A Plane-Crystal and Bent-Crystal High Resolving-Power Neutron Spectrometer

The resolving function and the shape of the rocking curves are calculated for plane-crystal neutron spectrometers,taking into account the effect of total reflection from the collimator walk. The features of crystal-type neutronspectrometers are described for the plane-crystal and bent-crystal variants, and results obtained with such a spectrometer are presented. When using a calcite crystal, the resolving power of the instrument is 0.53 μsec/m. In this case, the energy range extends up to 5.5 ev. Results obtained with a bent-quartz crystal are presented.