Deformation luminescence of X-ray-irradiated KCl:Eu2+single crystals by compression

被引：3
|
作者：
Kohzuki, Y. [1 ]
Ohgaku, T. [2 ]
机构：
[1] Saitama Inst Technol, Dept Mech Engn, 1690 Fusaiji, Fukaya, Saitama 3690293, Japan
[2] Kanazawa Univ, Grad Sch Nat Sci & Technol, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan
来源：
JOURNAL OF LUMINESCENCE | 2023年 / 253卷
关键词：
X-ray irradiation; Thermoluminescence; Colour centre; F-bleach; Thermal-bleach; OPTICALLY STIMULATED LUMINESCENCE; F-CENTERS; KCL; MECHANOLUMINESCENCE; KCL-CA2+; EUROPIUM; UV;
D O I：
10.1016/j.jlumin.2022.119469
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new peak appears around 330 K on the thermoluminescence (TL) glow curve under the influence of compressive deformation for X-ray-irradiated KCl:Eu2+ (0.02 mol%) crystal. This new peak is termed 330 K peak here. Deforming the crystal by the compression, mechanoluminescence intensity varies according to the three -stage strain hardening of stress-strain curve and depends on dislocation motion during plastic deformation of the crystal. The 330 K peak is also variable with strain in accordance with the variation of stress and correlates with dislocation motion in the crystal. Analysing the data on F- and thermal-bleaching effects of the compressed crystal, the colour centre on the 330 K peak has a new energy-band near F-band. The TL spectrum of the compressed and subsequent X-ray-irradiated KCl:Eu2+ crystal has a peak of 420 nm at the 330 K peak. From this experimental result, it is deduced that the 330 K peak relates to the excited Eu2+ ions as the origin of luminescence.
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页数：7
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