Study and understanding of n/γ discrimination processes in organic plastic scintillators
Abstract
For 50 years, it was assumed that unlike liquid scintillators or organic crystals, plastic scintillators were not able to discriminate fast neutrons from gamma. In this work, we will demonstrate that triplet-triplet annihilations (which are responsible of n/γ discrimination) can occur even in plastic scintillators, following certain conditions. Thus, the presentation will deal with the chemical preparation, the characterization and the comparison of n/γ pulse shape discrimination of various plastic scintillators. To this aim, scale-up of the process allowed us to prepare a Ø 100 mm × ≈ 110 mm thick.
Keywords
Chemical preparation
Fast neutrons
Helium-3
Home land security
Liquid scintillator
Plastic scintillator
Pulse shape discrimination
Triplet-triplet annihilation
Explosives
Fluorescence
Ionization
Neutrons
Radioactivity, ionizing radiation
Scintillation counters
instrumentation, nuclear instrumentation, neutrons, detector, Neutron-gamma discrimination