The interaction of deep traps in anion-defective α-Al2O3

被引：11

作者：

Pelenyov, VE ^{[1
]}

Kortov, VS ^{[1
]}

Milman, II ^{[1
]}

机构：

[1] Ural State Tech Univ, Dept Tech Phys, Ekaterinburg 620002, Russia

来源：

RADIATION MEASUREMENTS | 2001年 / 33卷 / 05期

关键词：

thermoluminescence; corundum; deep traps; F-type centers; luminescence emission spectra;

D O I：

10.1016/S1350-4487(01)00072-5

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

This paper deals with the examination of thermoluminescence (TL) optical spectra (200-800 nm) for deep traps (DT) observed near 730 K (DT1) and 785 K (DT2) at beta = 2 K/s in dosimetric alpha -Al2O3 crystals. The DT1 spectrum consisted of two luminescence bands near 3.56 and 2.42 eV. The DT2 spectrum had one band near 2.95 eV. The 3.56 eV emission band was assigned to the F+-center luminescence and the 2.95 eV band to the F-center luminescence. The excitation spectra of the 2.42 eV emission band measured at RT had one peak at 4.11 eV. The intensity correlated with filling of deep traps. It was supposed that anion-defective corundum contained complex F-type centers. The state of those centers changed upon exposure to UV irradiation at a high temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：629 / 631

页数：3

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