Browsing by Author "Felder, Richard Douglas"
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Item Calibration of a high energy neutron detector(1975) Felder, Richard Douglas; Mutchler, Gordon S.The detection efficiency of a large cylindrical block of NE-12 scintillator was measured for neutrons with energies from 2 to 5 MeV. The experimental technique employed quasi-free p-n and p-p scattering from p-d breakup at 8 MeV and relied on the spectator model description of these processes. The measured efficiencies are 15% to 4% larger than the best calculated efficiencies and show an increasing deviation with neutron energy. The observed discrepancies are explained in terms of nuclear in-scattering and possible deficiencies in the spectator model. Several changes in the experimental apparatus and technique are suggested to improve the efficiency measurement.