mateltechИзвестия высших учебных заведений. Материалы электронной техникиIzvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering1609-35772413-6387MISIS10.17073/1609-3577-2019-1-27-34mateltech-289Research ArticleМатериаловедение и технология. ДиэлектрикиMATERIALS SCIENCE AND TECHNOLOGY. DIELECTRICSВлияние солегирования Ca2+ и Zr4+ на оптические характеристики монокристаллов Gd3Al2Ga3O12 : CeInfluence of Ca2+ and Zr4+ codoping on the optical characteristics of Gd3Al2Ga3O12:Ce single-crystalКасимоваВ. М.KasimovaV. M.

Касимова Валентина Маратовна — аспирант, инженер

Ленинский просп., д. 4, Москва, 119049, Россия

Valentina M. Kasimova: Master Student

Leninsky Prospekt 4, Moscow 119049, Russia

kasimovavalya@mail.ruhttps://orcid.org/0000-0003-4057-9718КозловаН. С.KozlovaN. S.

Козлова Нина Семеновна — канд. физ.-мат. наук, старший научный сотрудник

Ленинский просп., д. 4, Москва, 119049, Россия

Nina S. Kozlova: Cand. Sci. (Phys.-Math.), Head of Laboratory

Leninsky Prospekt 4, Moscow 119049, Russia

kozlova_nina@mail.ruhttps://orcid.org/0000-0002-7532-5710БузановО. А.BuzanovO. A.

Бузанов Олег Алексеевич — канд. техн. наук, главн. науч. сотрудник

ул. Буженинова, д. 16, стр. 1, Москва, 107023, Россия

Oleg A. Buzanov: Cand. Sci. (Eng.), Leading Researcher

16 Buzheninova Str., Moscow 107023, Russia

buzanov@newpiezo.comhttps://orcid.org/0000-0002-3250-3206КозловаА. П.KozlovaA. P.

Козлова Анна Петровна — ведущий инженер

Ленинский просп., д. 4, Москва, 119049, Россия

Anna P. Kozlova: Leading Engineer

Leninsky Prospekt 4, Moscow 119049, Russia

kozlova.ap@misis.ruhttps://orcid.org/0000-0002-5844-5673ЗабелинаЕ. В.ZabelinaE. V.

Забелина Евгения Викторовна — канд. физ.-мат. наук, ведущий инженер

Ленинский просп., д. 4, Москва, 119049, Россия

Evgeniya V. Zabelina: Cand. Sci. (Phys.-Math.), Leading Engineer

Leninsky Prospekt 4, Moscow 119049, Russia

zabelina.ev@misi.ruНациональный исследовательский технологический университет «МИСиС»National University of Science and Technology MISiSОАО «Фомос-Материалс»JSC Fomos-Materials2019101220192212734Copyright © Касимова В.М., Козлова Н.С., Бузанов О.А., Козлова А.П., Забелина Е.В., 20192019Касимова В.М., Козлова Н.С., Бузанов О.А., Козлова А.П., Забелина Е.В.Kasimova V.M., Kozlova N.S., Buzanov O.A., Kozlova A.P., Zabelina E.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://met.misis.ru/jour/article/view/289

Сцинтилляционные материалы, способные преобразовывать поглощенные высокоэнергетические частицы в фотоны видимого излучения, находят множество областей применения, в частности в современных методах медицинской визуализации. Среди кислородсодержащих сцинтилляторов перспективным для использования в качестве детектирующего кристаллического элемента позитронно-эмиссионного томографа является Gd3Al2Ga3O12 : Ce за счет своих уникальных свойств: высокой плотности, высокого значения световыхода, радиационной стойкости и т. д. Однако его кинетические характеристики в настоящее время ограничивают использование кристалла для этих целей. Попытки изменения временных характеристик нарастания и спада люминесценции путем введения дополнительных примесей стали приоритетной задачей, которая рассматривается во многих работах. Анализ литературных данных показал, что оптические характеристики таких солегированных кристаллов исследованы недостаточно хорошо или вовсе не исследованы. В работе методами оптической спектроскопии в диапазоне длин волн 200—2200 нм исследованы кристаллы Gd3Al2Ga3O12 : Ce, солегированные Ca2+ и Zr4+. Измерены спектральные зависимости пропускания, поглощения и отражения, а также показатели преломления. Дисперсионные зависимости получены путем аппроксимации экспериментально измеренных показателей преломления методом Брюстера. Аппроксимацию проводили с использованием уравнения Коши. Оценены материальные константы этих уравнений для каждого из солегированных кристаллов.

Scintillation materials that can convert absorbed high-energy particles into photons of visible radiation find many applications, in particular in modern methods of medical imaging. Gd3Al2Ga3O12 : Ce is promising single crystal for use as a detecting crystal element of the positron emission tomographs due to its unique properties: high density, high light output, radiation hardness, etc. However, its scintillation kinetics currently limit the use of this crystal. Changing of these kinetics by codoping becomes a priority task, which is considered in many papers. The literature data analysis showed that the optical characteristics of such codoped crystals were not well enough studied or were not investigated at all. In this regard, the spectral dependences of transmission, absorption and reflection are measured using optical spectroscopy for Gd3Al2Ga3O12:Ce, Gd3Al2Ga3O12 : Ce,Ca and Gd3Al2Ga3O12 : Ce,Zr. Dispersion dependences of refractive in dices are obtained by approximating the refractive indices measured using the Brewster method. The approximation was carried out using the Cauchy equation. The material constants of this equation are estimated.

Gd3Al2Ga3O12:Ceсцинтилляционный монокристаллсолегированиеспектрофотометрия пропусканияпоказатель поглощенияпоказатель преломленияметод БрюстерааппроксимацияGd3Al2Ga3O12 : Cescintillation single-crystalcodopingtransmission spectrophotometryabsorption coefficientrefractive indexmethod of BrewsterapproximationРабота выполнена при финансовой поддержке Министерства науки и высшего образования Российской Федерации в рамках Государственного задания вузу № 3.2794.2017/ПЧ, № 11.5583.2017/ИТР (11.5583.2017/7.8), № 11.6181.2017/ИТР (11.6181.2017/7.8). Исследования проведены в МУИЛ Полупроводниковых материалов и диэлектриков «Монокристаллы и заготовки на их основе» (ИЛМЗ) НИТУ «МИСиС».This work was financially supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of the State Assignment to the University No. 3.2794.2017/PCh, No. 11.5583.2017/Engineering (11.5583.2017/7.8), No. 11.6181.2017/Engineering (11.6181.2017/7.8). 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The authors declare that there are no conflicts of interest present.