ОПТИЧЕСКИЕ СВОЙСТВА МОНОКРИСТАЛЛОВ Y3Al5O12 (100) ОБЛУЧЕННЫХ ВЫСОКОЭНЕРГЕТИЧЕСКИМИ ИОНАМИ КСЕНОНА

YAG (Y₃Al₅O₁₂) является одним из важных оптических материалов. Он широко используется в твердотельных лазерах, осветительных приборах в качестве преобразователя белого светодиода, а также в сцинтилляционной технике.

В настоящей работе монокристаллы YAG (100) облучались ионами Xe с энергией 230 МэВ до флюенсов 6·10¹⁰– 10¹³ ион/см², что позволяет изучить поведение материала в полях жесткой радиации. Для анализа облученных кристаллов YAG использовались следующие методы исследования: спектроскопия оптического поглощения и спектроскопия комбинационного рассеяния. Анализ спектров поглощения показывает образование центров окраски в облученных образцах YAG. Концентрация различных типов точечных дефектов значительно увеличивается с ростом флюенса. Разностные спектры обнаруживают перекрывающиеся полосы в диапазоне 4,1–5,2 эВ, которые соответствуют различным конфигурациям F₂-центров. С увеличением флюенса приповерхностный слой становится аморфным, и материал аморфизуется. Высокоэнергетические моды рамановских спектров начинают расширяться уже при флюенсе 10¹⁰ ион/см². Учитывая высокую степень воздействия ионов Xe, можно утверждать, что начиная с флюенса 10¹² ион/см² все катион-анионные связи практически разрушаются.

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