Large, time-compensated scintillation counters for high-energy neutron time-of-flight measurements

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Abstract

The design of large, time-compensated scintillation detectors for medium and high energy neutrons is analyzed and tested experimentally. It is shown that with an appropriate geometrical layout and a corresponding choice of timing, neutron and photon transit time effects cancel, resulting in good resolution for large detectors. We observe subnanosecond overall time resolution (fwhm) for 26 MeV neutrons on scintillators as long as 1 m viewed by a single phototube.

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