Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2021
Optimization of composition of liquid organic scintillators for fast neutron spectrometry
Abstract
Abstract Liquid organic scintillators are important materials for measurements of neutron radiation. This work aims to develop and optimize the composition of liquid organic scintillators so they can be used for fast neutron spectrometry. As neutron radiation is usually accompanied with γ ray radiation, this work is focused on γ /n discrimination. It is shown that Di-iso-propylnaphthalene Mixed Isomers and 1-Methylnaphthalene are capable of good γ /n discrimination. Afterwards, the concentration of luminophores is varied and it is shown that the PYR and THIO luminophores with concentrations above 3\xa0g/l have Figure of Merit FOM > 1 . 27 above the energy threshold of 0 . 14 MeVee and 0 . 17 MeVee , respectively.