Search academic texts

Information × Registration Number 0223U000847, 0122U200141 , R & D reports Title Specific features of forming the radioluminescent response in organic materials with stochastic nature of light propagation popup.stage_title Head Tarasenko Oleh A., Доктор фізико-математичних наук Registration Date 20-01-2023 Organization Institute for scintillation materials NAS Ukraine popup.description2 Samples of scintillation organic polycrystals of stilbene and p-terphenyl with different sizes of crystal grains, samples of organic single crystals as references were obtained. We have studied the light output and optical transmittance of polycrystals of stilbene and p-terphenyl with the following fractions of crystalline grains: 0.06 – 0.1 mm; 0.1 – 0.3 mm; 0.3 – 0.5 mm; 0.5 – 1.0 mm; 1.0 – 1.5 mm; 1.5 – 2.0 mm; 2.0 – 2.5 mm (diameter 20 mm and height 2 mm). Modeling of light transmission in polycrystalline samples of stilbene and p-terphenyl scintillators obtained by the hot-pressing method was carried out. We calculated the values of light collection coefficients of polycrystalline samples. It was found that to obtain the polycrystalline samples with sufficiently high light output and high efficiency of detection of local sites of interaction of ionizing radiations, the crystalline grains in the range of 0.4–0.8 mm should be used. The calculations of the density of polycrystalline samples of p-terphenyl by the gamma method and the concentration of C18H14 molecules in the samples were carried out. Product Description popup.authors Lazariev Ihor V. Martynenko Eugenia V. Tarasenko Oleh A. Tarasov Volodymyr О. popup.nrat_date 2023-01-20 Close