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Information × Registration Number 0218U002318, 0115U003251 , R & D reports Title Interaction of ionizing radiation with nanocomposites based on nanoparticles dispersed into dielectric matrixles popup.stage_title Head Voloshynovskyy Anatoliy Stepanovych, Доктор фізико-математичних наук Registration Date 14-02-2018 Organization Ivan Franko National University of Lviv popup.description2 The features of high-energy radiation interaction with composites based on polymeric matrix loaded with micro- and nanoparticles of fluorides and oxides (BaF2, SrF2, LaPO4-Pr etc.) are determined. The ratio between the size of nanoparticles embedded in polystyrene matrix and mean free path length and photoelectron thermalization length are found to be crucial for understanding the processes of energy transfer in polymer composites. Non-radiative excitation energy transfer from small nanoparticles (~ 20 nm) to polystyrene by photoelectric effect is established to be more efficient than that for larger nano- and microparticles, where radiative energy transfer is dominant. Polystyrene matrix excited by electrons emitted from small nanoparticles under X-ray absorption and composite scintillator reveal luminescence and decay time characteristic for polystyrene scintillator without embedded nanoparticles with decay time constant ? ~ 2 ns, and the emission intensity considerably exceeds the intensity of pure polystyrene scintillator. Product Description popup.authors Вістовський В.В. Волошиновський А.С. Галяткін О.О. Гамерник Р.В Глосковська Н.В. Демків Т.М. Жишкович А.В. Заіченко О.С. Кашуба А.І. Мітіна Н.Є. Малий Т.С. Мягкота О.С. Пашук І.П. Перевізник О.Б. Чорнодольський Я.М. Якібчук П.М. popup.nrat_date 2020-04-02 Close