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Information × Registration Number 0223U000682, 0121U111396 , R & D reports Title Development of new fast-acting radiation-resistant scintillation materials for experiments in high-energy physics. popup.stage_title Head Kretch Anton V., Кандидат технічних наук Registration Date 18-01-2023 Organization Institute for scintillation materials NAS Ukraine popup.description2 The technological aspects of obtaining scintillation materials were clarified and experimental samples of composite scintillators containing grains of inorganic crystals based on YAG were made. Composite scintillators with a short decay time, which contain YAG crystal granules, have been created. It has been established that for the creation of YAG-based composite scintillators, the optimal grain sizes are in the range from 0.3 to 2.0 mm. Experimental methods of researching the scintillation properties of samples of composite scintillators have been improved, and their scintillation characteristics have been studied. A study of the causes of cracking of composite scintillators during irradiation with a high rate of irradiation was carried out. For example, with irradiation at a rate of 1500 Mrad/h, cracking is observed at doses over 200 Mrad. In this case, both ionizing radiation and thermal expansion of materials can affect cracking. Ionizing radiation leads to densification and crosslinking of the polymer part of the composite scintillator, thereby reducing its elasticity. At a dose rate of 1500 Mrad/h, the composite scintillator on the conveyor receives a dose of 5 Mrad in 12 s. This leads to heating of the sample by 50°C and a slight increase in the linear dimensions of the crystalline grains. Thus, a decrease in the elasticity of the polymer and the thermal expansion of the crystalline grains under the influence of irradiation leads to cracking. Product Description popup.authors Gerasymov Yaroslav V. Karavaeva Natalya L. Kretch Anton V. popup.nrat_date 2023-01-18 Close