A measurement of the light output function of the deuterated liquid scintillator NE-230 to recoil deuterons with energies between 0.62 and 14.5 MeV
The light output function for deuterons in NE-230 deuterated liquid scintillator has been determined over the deuteron energy range 0.62 to 14.5 MeV. This was achieved by analysing the pulse-heigh distributions produced by recoil deuterons stopping in a scintillator 100 mm in diameter and 50 mm thick. The recoil deuterons were generated by bombarding the scintillator with monoenergetic neutrons produced using the T(p, n), D(d, n), 9Be(α, n 0), 9Be(α, n 1) and T(d, n) reactions at the Harwell 5 MV Van de Graaff accelerator facility. The light output scale was defined using Compton electron spectra, and pulse shape discrimination was use to distinguish between neutron and gamma-ray events. The light output function for deuterons was determined by measuring the upper half-height positions of the peaks in their pulse-height distributions as funtion of neutron energy, and applying a calculated correction for the finite system resolution.