Thermal- and photo-induced transformations of luminescence centers in αd-Al2O3 anion-defective crystals

被引：33
|
作者：
Solov'ev, S. V. [1 ]
Milman, I. I. [1 ]
Syurdo, A. I. [2 ]
机构：
[1] Ural State Tech Univ UPI, Yeltsin Ural Fed Univ, Ekaterinburg 620002, Russia
[2] Russian Acad Sci, Inst Ind Ecol, Ural Branch, Ekaterinburg 620219, Russia
来源：
PHYSICS OF THE SOLID STATE | 2012年 / 54卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
OPTICAL-PROPERTIES; DEEP TRAPS; F+-CENTERS; PHOTOCONVERSION; ALPHA-AL2O3; MODEL;
D O I：
10.1134/S1063783412040270
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The thermal- and photo-induced transformations of luminescence centers in anion-defective crystals of alpha-Al2O3 have been investigated. It has been found that the exposure of crystals to ultraviolet light at temperatures in the range 50-900A degrees C leads to substantial changes in their thermoluminescence and radioluminescence spectra. According to the optical absorption and photoluminescence data, the detected F-type centers have been identified and the temperature ranges of the F -> F (+) -> F (2) transformations and their possible mechanisms have been determined. The special attention has been drawn to the detailed similarity in the formation of complex F (2)-type centers in the initially perfect alpha-Al2O3 crystals irradiated with fast neutrons and in the studied anion-defective crystals.
引用
收藏
页码：726 / 734
页数：9
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