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New scintillation materials based on oxide compounds, activated by trivalent elements


Work number - M 26 AWARDED

Authors:

Kononets V. V., Krech A. V., Bordun I. O.

 

Presented by the Institute for Scintillation Materials of NAS of Ukraine

 

The aim of the work was the development of oxide scintillation materials with new properties that are necessary for modern instrument-making. In particular, materials with ultrahigh radiation resistance (for the problems of high-energy physics), nanoscale screens (with improved spatial uniformity of registration of cathodoluminescence) and supersensitive scintillation materials (for the problems in radioecology).

The authors, for the first time, obtained single-crystal LGSO:Ce, LuAG, LuAG:Ce, YAG:Ce, Al2O3:Ti fibers, (Lu1-xYx)3Al5O12:Ce and Y3(Al1-xGax)5O12:Ce bulk single crystals, and developed radiation-resistant composite scintillators based on singlecrystal grains of GSO:Ce, GPS:Ce, YSO:Ce, YAG:Ce, Al2O3:Ti, and their improved optical and scintillation parameters were investigated. For the first time, uniform thin Y2O3:Eu films were obtained by high-frequency ion plasma sputtering method and their characteristics were investigated.

The authors demonstrated the possibility of producing of LuAG, LuAG:Ce and YAG:Ce fibers with attenuation length from 22 cm. Experimentally proved that the composite scintillators developed in the work, based on oxide single crystal grains, were radiation resistant to dose above 125 Mrad (and in some individual cases to dose above 550 Mrad), fully comply with modern requirements of radiation resistance in experiments on high-energy physics. For the first time, it was established that during high-frequency ion plasma sputtering of Y2O3:Eu, an increase of the concentration of the activator (1.0–5.0 mol.%) leads to an increase in the size of crystallites, which form the thin film with width from 16 to 353 nm, respectively.

New functional materials that have been developed and researched during the implementation of the cycle of works lay the necessary basis for the designing of a new generation of detection devices. It has been experimentally proved that oxide scintillation materials developed in a cycle of works, activated by trivalent elements, have improved the performance characteristics. In particular, ultra-high radiation resistance (high-energy physics), improved spatial uniformity of registration of cathodoluminescence (nanoscale screens), supersensitivity of scintillation materials (radioecology), and etc.

The number of publicationsis 73, which includes 29 scientific articles (26 are in the Scopus database), 55 conference abstracts and 2 patents of Ukraine. The total number of references to the scientific publications by Scopus presented in the work is 166 and the h-index of the work is 6; by Google Scholar the total number of references is 204 and the h-index of the work is 7; the total number of references by Web of Scienceis 152 and the h-index of the work is 6. 3 PhD theses were defended during this cycle of scientific publications.

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