Thermoactivated spectroscopy in dosimetric α-Al2O3

被引：8

作者：

Surdo, A. I. ^{[1
]}

机构：

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

来源：

RADIATION MEASUREMENTS | 2007年 / 42卷 / 4-5期

关键词：

thermoluminescence; exoelectron emission; kinetic parameters; corundum;

D O I：

10.1016/j.radmeas.2007.02.008

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：

Thermally stimulated luminescence and exoelectron emission (TL and TEE) near the main dosimetric (440K) "chromium" (550K) peaks were studied in anion-deficient alpha-Al2O3-delta crystals by methods of modulation thermoactivated spectroscopy with optical and X-ray excitation. Temperature dependences of kinetic parameters of TL and TEE processes were calculated from the obtained results. An anomalous behaviour and overestimated values of the activation energy in the region of main peak were revealed. Possible causes of the observed deviations were discussed. A model of the defect responsible for the TL and TEE peaks near 440 K was proposed. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：763 / 766

页数：4

共 7 条

[1]

Kortov V.S., 1997, ZH EKSP TEOR FIZ+, V67, P72

[2] Origin of the 430 K TL peak in thermochemically reduced alpha-Al2O3 [J].