Majority-Logic NE-110 Detector for keV Neutrons

Abstract

An NE-110 proton-recoil scintillation counter whose efficiency is reproducible and stable has been developed for neutrons in the energy range from 5 keV to 1 MeV. Majorityof-two logic at below the single photoelectron level is used between two or more phototubes viewing the same scintillator. Pulse height distributions as a function of neutron energy have been measured between 5 and 350 keV with two different detector configurations: a thin square slab of NE-110 and a cylinder of NE-110. The absolute efficiency of the slab detector has also been determined. The measured results are in good agreement with results from Monte Carlo calculations.

Neutron cross section measurements using the Oak Ridge Electron Linear Accelerator

“…The efficiencies of the six detectors are quite similar and the carbon scattering measurement serves to normalize the efficiencies. Details on the calculated efficiencies for these two phototube detectors are given in Hill et al (1985).…”