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A large-area position-sensitive detector for fast neutrons

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
Publication Date
DOI: 10.1016/0168-9002(93)90813-w


Abstract Six plastic-scintillator (BC408) neutron detectors of dimensions 10 × 10 × 100 cm 3 with position sensitivity along their length have been developed. Test measurements of the time, position and pulse-height resolution as a function of position and amount of the deposited energy have been performed using a 3 GeV electron beam. For pulse-heights exceeding those of 9 MeV (40 MeV) protons, the resolution of the time difference Δt 12 was better than 280 (150) ps, yielding a position resolution ≤ 4 cm (2 cm) FWHM. The effective pulse-height response varied less than 7% over the whole length of the detector. The detection efficiency was measured using a 252Cf source; comparisons with the Monte Carlo code NEFF4 showed good agreement.

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