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In this work, first results on newly developed thermal neutrons scintillators are reported. The main focus is the synthesis and characterization of (LiF)-Li-6 nanoparticles, to be added to the polysiloxane matrix as neutron absorber. The preparation of (LiF)-Li-6 nanocrystals has been pursued by co-precipitation technique, using a mixture of water and ethanol in different ratios. The as-prepared nanocrystals have been characterized in terms of crystal structure and crystallite size by X-ray diffraction, whereas the composition has been investigated by energy dispersive spectroscopy. In this preliminary step towards the realization of a new detector, the commercial inorganic phosphor ZnS:Ag (EJ-600) has been used as scintillating medium. A fixed weight ratio of (LiF)-Li-6 nanocrystals and EJ-600 phosphor has been chosen, namely 3:1 EJ-600:(LiF)-Li-6, whereas different amounts of the mixture have been added to the polysiloxane binder, prior to cross-linking. The composites have been benchmarked as for light output and thermal neutrons detection efficiency against a commercial sample of EJ-426 taken as a reference.

Siloxane-Based Nanocomposites Containing 6LiF Nanocrystals for Thermal Neutrons Detection

Siloxane-Based Nanocomposites Containing ⁶LiF Nanocrystals for Thermal Neutrons Detection