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Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

“…Organo-gadolinium compounds soluble in classical monomers (MMA and styrene): (a) General formula of gadolinium phenyl-carboxylate; [28], (b) gadolinium isopropoxide; [26] and (c) gadolinium phenylpropionate [32]. Britvich et al [24] reported as well the use of neutron absorbers for plastic scintillators, loading either in the form of o-carborane (4%), boric acid [25] (3%) or 6 LiF (0.1%). Scintillation yields were measured to be 8600, 6200 and 9400 ph/MeV respectively.…”

Current Status on Plastic Scintillators Modifications

“…Britvich et al 47. reported the use of neutron absorbers for PS loading, either in the form of o ‐carborane (4 %), boric acid48 (3 %), or 6 LiF (0.1 %). Scintillation yields were measured to be 8600, 6200, and 9400 ph MeV −1 respectively.…”

An improved Shashlyk calorimeter

“…Fluors for the new scintillator composition, BASF143E polystyrene + 1.5% PTP + 0.04% POPOP were selected [12,13] Wave length, nm Emission / Absorption, a.u. Shashlyk module (at the entrance to the photo-detector) becomes N γ ≈ 60 photons per 1 MeV of the incident photon energy.…”

“…It was reported [12] that the radiation stability of BASF143E-based scintillator is a dose level 120 krad, and the recovery time is about 80 days. This limitation would not be a problem for the KOPIO Calorimeter for which this Shashlyk module was designed.…”