A sensitive x-ray storage phosphor based on BaFBr:Eu2+, KF/LiF with higher storage stability

被引：1
|
作者：
Sangeetha, L. [1 ]
Lakshmanan, Arunachalam [1 ]
机构：
[1] Saveetha Engn Coll, Chennai 602105, Tamil Nadu, India
来源：
RADIATION MEASUREMENTS | 2019年 / 129卷
关键词：
X-ray storage phosphor; BaFBr:Eu2+; Monovalent co-dopants; Synergistic flux action; High storage stability; Stimulated luminescence process; THERMALLY STIMULATED LUMINESCENCE; PHOTOSTIMULATED LUMINESCENCE; F-CENTERS; GENERATION; BAFBR-EU2+;
D O I：
10.1016/j.radmeas.2019.106209
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：
A sensitive x-ray storage phosphor based on fluorine excess BaFBr:Eu2+KF/LiF possessing high storage stability has been synthesized. The electron-hole recombination process giving rise to photostimulated luminescence (PSL) is described. No red shift in the stimulation spectra on alkali co-doping and thus no electron trapping at the Br- vacancies beside the alkali compounds were observed. The enhanced photoluminescence (PL) and PSL efficiencies could very well be explained by the synergistic flux action of the co-dopant(s) and BaBr2 at 850 degrees C which increases the crystallinity and doping efficiency. Sintering temperatures >900 degrees C enhanced the luminescence efficiencies of BaFBr:Eu2+ and BaFBr:Eu2+,KBr due to thermal migration of F-i(-) ions.
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页数：9
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