Abstract
Abstract The pulse height distributions for organic liquid scintillation counters irradiated with fast neutrons have been calculated using a Monte Carlo computer programme. The results obtained at 1,4 and 14 MeV neutron energies for a cylindrical scintillator 2″ diameter × 2 1 2 ″ long have been compared with experimental measurements and good agreement is obtained. In the experiments, the pulse shape discrimination and time of flight techniques have been used independently to eliminate the effect of γ-rays. The neutron detection efficiency has also been measured in the energy range 0.4 to 3.5 MeV and the results compared qualitatively with those obtained by the Monte Carlo calculation. In addition the pulse height response of the liquid scintillator type NE213 for protons and electrons is obtained and this is similar to that of the plastic phosphor type NE102.
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