Abstract

A technique for determining the time-dependent backgrounds associated with low-energy neutron time-of-flight spectrometers has been developed. Mathematical equations are presented showing how the backgrounds can be determined from transmission measurements through boron filters. A detector-scattered background, which consists of neutrons scattered by the detector, somewhat moderated by the surroundings and subsequently detected, is also discussed. Data from neutron transmission measurements of water, carbon and cobalt are presented which demonstrate background are being measured adequately.

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