Abstract
A layered NaI scintillation detector (total thickness = 30.6 cm) was exposed to tagged neutrons at the Los Alamos Meson Physics Facility. The neutrons were approximately monoenergetic at ten energies in the range 36–709 MeV. The energy loss of the neutrons in the detector was subsequently simulated using a Monte Carlo program, which incorporated the HETC, EGS, and MORSE computer codes. The agreement between the experiment and the simulation for the detection efficiency was within 35%. A comparison of the measured and calculated energy-loss spectra showed differences generally within 50%. Details of the detector geometry, the Monte Carlo simulation, and the comparison of the data and the simulation are presented.
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