Characterization of a Li-6 loaded liquid organic scintillator for fast neutron spectrometry and thermal neutron detection

Abstract

The characterization of a liquid scintillator incorporating an aqueous solution of enriched lithium chloride to produce a scintillator with 0.40% Li-6 is presented, including the performance of the scintillator in terms of its optical properties and neutron response. The scintillator was incorporated into a fast neutron spectrometer, and the light output spectra from 2.5 MeV, 14.1 MeV, and Cf-252 neutrons were measured using capture-gated coincidence techniques. The spectrometer was operated without coincidence to perform thermal neutron measurements. Possible improvements in spectrometer performance are discussed.

arXiv commentSubmitted to Applied Radiation and Isotopes. 11 pages, 7 figures, 3 tables. Revision addresses reviewers' comments

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• Neutron-$\gamma$ discrimination with organic scintillators: Intrinsic pulse shape and light yield contributions
• Performance of a segmented ${}^6$Li-loaded liquid scintillator detector for the PROSPECT experiment
• Lithium-loaded Liquid Scintillator Production for the PROSPECT experiment
• Light Collection and Pulse-Shape Discrimination in Elongated Scintillator Cells for the PROSPECT Reactor Antineutrino Experiment
• Fast Neutron Detection with a Segmented Spectrometer
• Energy-resolved fast neutron resonance radiography at CSNS
• Development and Characterization of a High Sensitivity Segmented Fast Neutron Spectrometer (FaNS-2)
• Neutron background measurements with a hybrid neutron detector at the Kuo-Sheng Reactor Neutrino Laboratory
• ${}^6$Li-loaded liquid scintillators produced by direct dissolution of compounds in diisopropylnaphthalene (DIPN)