Photoluminescence and thermoluminescence studies in BaSO4:Eu

被引：4
|
作者：
Varalakshmi, S. [1 ]
Lakshmanan, Arunachalam [1 ]
机构：
[1] Saveetha Engn Coll, Chennai 602105, India
来源：
JOURNAL OF LUMINESCENCE | 2022年 / 251卷
关键词：
BaSO4 : Eu; Photoluminescence; Thermoluminescence; Scintillator; X-ray image intensifier; CALCIUM-SULFATE; LUMINESCENCE; TL; FLUORESCENCE; PHOSPHOR; ESR;
D O I：
10.1016/j.jlumin.2022.119114
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
BaSO4: Eu2+ made with EuCl3 dopant along with MgCl2 and NaCl flux using solid state reaction exhibit high thermoluminescent (TL) sensitivity. Efficient Charge Transfer (CT) transitions between PO43- ions (hole traps) and adjacent anion vacancies (electron traps) offers a clue in the development ultra high sensitive TL phosphor based on BaSO4:Eu,P. However, BaSO4: Eu made with Eu2O3 dopant along with (NH4)(2)SO4 and Na2SO4 flux is suited for scintillation and X-ray image intensifying screens as it exhibits intense violet (375 nm) fluorescence emission with negligible afterglow up to 125 C on X-ray irradiation while commercial BaFBr:Eu image inten-sifying phosphor exhibits intense afterglow at temperatures & GE;100 C. The reduced afterglow of BaSO4:Eu is attributed to the elimination of chlorine ion interstitials and anion vacancies responsible for TL production.
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页数：11
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