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Information × Registration Number 0221U105878, 0121U112061 , R & D reports Title Heterostructured organic scintillators with high ability to separate ionizing radiation by scintillation pulse shape for radioecology problems. popup.stage_title Head Galunov Mykola Z., Доктор фізико-математичних наук Registration Date 06-09-2021 Organization Institute for scintillation materials NAS Ukraine popup.description2 The purpose of the work is a development of the materials for separate detection of ionizing radiations; a study of the physical mechanisms that determine the ability of these materials to separate detection of ionizing radiations with different specific energy losses. Duration of investigations: May 1, 2021 - August 31, 2021. The purpose of the current stage: to obtain and study the samples of organic heterostructured materials based on stilbene and p-terphenyl with different sizes of crystalline grains. As a result of the project the following results were obtained: As it expected, due to the differences in the mechanisms of formation of the prompt and the delayed fluorescence of a fluorescent signal, the dependences of the luminescence intensity as the function of a grains size significantly differed for the radiation excitation and for the excitation by photons of light. Upon the excitation by alpha particles the signal increased with increasing the size of grains and it was maximal for single crystals. The same was observed earlier for the case of excitation of these materials by light in the first singlet state. At constant excitation by light in the region of absorption of triplet excitons, we obtained the results that differ significantly from the result described above. Product Description popup.authors Galunov Mykola Z. Karavaeva Natalya L. Kretch Anton V. Lazarev Igor V. Minenko Sergii S. Makhota Serhiy V. Polupan Yaroslava I. Tarasenko Oleg А. Khromiuk Hilarion F. popup.nrat_date 2021-09-06 Close