Response function of a NE213 liquid scintillation detector simulated by EGS4/PRESTA code for a collimated gamma-ray beam

Abstract

For photon spectrometry in a mixed neutron-photon field, a NE213 liquid scintillation detector is one of the useful instruments which has an excellent neutron-photon discrimination capability. The gamma-ray response function for a NE213 detector is required for unfolding measured pulse height spectra. The EGS4/PRESTA code was used to simulate the gamma-ray response function taking into accounts the detail information on the detector assembly. Experimental data were taken in the energy range below 1.8 MeV using a collimated gamma-ray beam of radioisotope reference sources. For the higher energies up to 10 MeV, a Laser-Compton-Scattered (LCS) photon source was used as a collimated quasi-monoenergetic photon beam. The simulated response function showed a good agreement with experimental data at different energies.