Large solubility of lithium carboxylates reaching high rates of 6Li incorporation in polystyrene-based plastic scintillators for fast/thermal neutron and gamma ray detection?
Materials Chemistry Frontiers Pub Date: 2019-06-03 DOI: 10.1039/C9QM00153K
Abstract
6Li-Doped plastic scintillators (PSs) have been optimized as radioluminescent sensors for detection of fast/thermal neutrons and gamma rays for several purposes such as homeland security. Among 16 low molecular weight (C < 8) lithium carboxylates, Liα-valerate (LiαVal) exhibits high potential for loading (up to 50 wt%) in clear PSs composed of polystyrene and standard fluors (20 wt% PPO, 0.03 wt% POPOP). A methodical study of PS composition illustrates that the Li carboxylates and methacrylic acid comonomers impact the scintillation yields (from 4410 to 7790 ph per MeV) and nthermal/nfast/gamma discrimination performances with significant figures of merit (from 0.23 to 1.45 above 180 keVee).
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Journal Name：Materials Chemistry Frontiers
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CAS no.: 89640-58-4
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