Abstract
A high-precision neutron time-of-flight facility has been constructed. The facility couples the advantages of an intense monoenergetic neutron source produced by a pulsed and bunched ion beam with those of a high-energy resolution, high mechanical precision, heavily shielded neutron time-of-flight spectrometer-goniometer. The system provides the necessary incident neutron energy stability and resolution, scattered neutron energy and angular resolution, and unusual freedom from background radiations to achieve measurements of differential scattering cross sections with magnitudes as small as 1 mb/sr to better than 5% absolute accuracy. The measures required to achieve this sensitivity and accuracy include optimization of the mechanical, shielding, and electronic systems, as well as the procedures for obtaining and analyzing the data.
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