Registration Number
0225U002610,
(0122U002637)
, R & D reports
Title
Influence of impurity defects on optical and scintillation properties of complex oxide crystals obtained in a reducing atmosphere.
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Вплив домішкових дефектів на оптичні та сцинтиляційні властивості складних оксидних кристалів, отриманих у відновній атмосфері.
Head
Hrynyov Borys V., Доктор технічних наук
Sidletskyi Oleh T., Доктор технічних наук
Registration Date
21-03-2025
Organization
Institute for scintillation materials NAS Ukraine
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To gain a better understanding of the influence of impurity defects in complex oxide materials obtained in a reducing medium on the scintillation process in them and making recommendations on developing crystal scintillators with improved parameters.
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The work was aimed at the study the influence of co-dopants in complex oxide materials in the RE2O3 – Al2O3 – Ga2O3 та RE2O3 – SiO2 (RE = rare earth element) systems with carbon (C) impurities, and two- and monovalent elements (Ca2+, Mg2+, etc.) on the scintillation process in them and to develop recommendations for the creation of crystal scintillators with improved parameters. The relevance of the work is related to the need for cheap scintillators for medical imaging and high-energy physics with improved light output, high radiation resistance, and accelerated decay time. Future high-energy physics experiments at colliders should use bright scintillators with fast luminescence decay times. The use of new scintillators in medicine will increase the reliability of tomographic analysis and reduce the time and dose of radiation received by the patient during therapy. In particular, in experiments to register new types of particles at colliders, the interval between particle launches will be reduced to 25 ns, which means that detectors must register and process the signal and be ready to register a new particle within this time period. This creates a need for new scintillation materials with faster decay times. Under these conditions, the “ideal” scintillator is a material with a decay time of no more than 15 ns and a light output of at least 10,000 ph/MeV. At the same time, given the sharp rise in the cost of structural materials for growing complex oxide scintillators, in particular iridium crucibles and screens, processes for producing crystals using cheap molybdenum and tungsten crucibles were developed.
Product Description
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Halenin Yevhenii P.
Herasymov Yaroslav V.
Hrynov Borys V.
Kurtsev Daniil О.
Sidletskyi Oleh Ts.
Tkachenko Serhii A.
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2025-03-21
