ТЕРМОЛЮМИНЕСЦЕНТНЫЕ И ДОЗИМЕТРИЧЕСКИЕ СВОЙСТВА КЕРАМИК ДИОКСИДА ЦИРКОНИЯ, ОБЛУЧЕННЫХ ВЫСОКИМИ ДОЗАМИ ИМПУЛЬСНОГО ЭЛЕКТРОННОГО ПУЧКА

В работе представлены результаты исследования термолюминесцентные (ТЛ) и дозиметрические свойства керамик моноклинного диоксида циркония двух типов: синтезированных спеканием в электрической печи при Т = 700–1700 °С и в потоке высокоэнергетических электронов (1,4 МэВ) с высокой плотностью мощности. Установлено, что отжиг керамик первого типа при Т>1000 °С приводит к существенному росту размера кристаллитов, что коррелирует со значительным увеличением интенсивности ТЛ пика при 390 К после облучения образцов высокими дозами (порядка кГр) импульсного электронного пучка (130 кэВ). Максимальным ТЛ откликом обладают керамики типа 2, синтезированные электронно-лучевым методом. В работе обсуждаются также закономерности влияния условий синтеза на кинетические параметры ТЛ и коэффициенты нелинейности дозовых зависимостей. Наличие интенсивного изолированного пика ТЛ, сублинейный характер большинства дозовых зависимостей и пренебрежимо малый фединг свидетельствуют о перспективности синтезированных в настоящей работе керамик для измерения высоких доз (единицы-десятки кГр).

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