Registration Number
0224U032807,
(0123U102596)
, R & D reports
Title
Development of effective detection systems for the most harmful ionizing radiation for humans, for radioecology tasks
popup.stage_title
Розробка сцинтиляційних матеріалів, які містять гранули органічних монокристалів із оптимальними розмірами. Розробка конструкції сцинтиляційних детекторів, які містять шари сцинтиляційного матеріалу і світловодів, що чергуються.
Head
Tarasenko Oleh А., Доктор фізико-математичних наук
Registration Date
05-12-2024
Organization
Institute for Scintillation Materials of National Academy of Science of Ukraine
popup.description1
To develop a detection system based on composite heterostructured scintillation materials, with selective registration of different in its impact on the human body ionizing radiation.
popup.description2
The optimal grain sizes for creating organic composite scintillators were selected. For radioecology tasks and the detection of short-range particles, such as alpha particles, it is necessary to increase the relative light output. This was achieved by producing single-layer composite scintillators with grain sizes of less than 60 micrometers, where the effect of triplet exciton reflection from the grain surface followed by recombination is most pronounced. To create systems for the separate detection of alpha and gamma radiation, it is essential to develop bulk multilayer composite scintillators for the efficient registration of gamma radiation. On the other hand, the large number of scintillation layers leads to light scattering at the grain boundaries, resulting in a decrease in the number of photons detected by the photodetector. Therefore, it is necessary to use larger grains to reduce the number of scattering layers, even though they are scintillating. It was established that for solving these tasks, grains larger than 1.4 mm are optimal. One of the disadvantages of composite scintillators compared to single crystals is the collection of light from the scintillator volume due to light scattering at the grain-polymer and grain-grain interfaces, as well as the absorption of self-emission by the scintillator grains after multiple photon passages through them. To address this issue, spectrally-shifting materials based on the same polymer as the composite scintillator matrix were proposed, created, and studied.
Product Description
popup.authors
Karavaieva Nataliia L.
Krech Anton V.
Lazariev Ihor V.
Martynenko Yevheniia V.
Makhota Serhii V.
Tarasenko Oleh А.
Khromiuk Ilarion F.
popup.nrat_date
2024-12-05
