Polystyrene composites with loaded LaF3 nanoparticles for registration of ionizing radiation

Abstract

Film polymer composite scintillators based on scintillation polystyrene with n-terphenyl and POPOP activators and loaded LaF 3 nanoparticles have been developed for the registration of ionizing radiation. LaF 3 nanoparticles were obtained through precipitation involving ion substitution from LaCl 3 water and water-alcohol solution with the addition of NH 4 F solution. The spectral and kinetic properties of polymer nanocomposites under X-ray irradiation have been studied. It was found that the e(cid:30)ciency of the ionizing radiation detection for a polystyrene composite with loaded non-luminescence LaF 3 nanoparticles increases by an order of magnitude compared to the e(cid:30)ci-ency of a polystyrene scintillator without nanoparticles, maintaining the spectral composition of the polystyrene scintillator radiation and its speed was 3 ns. It is proposed that the main mechanism of the scintillation generation is the excitation of polystyrene matrix by electrons that escape from the nanoparticle by the mechanism of photoe(cid:27)ect under the in(cid:29)uence of