Hole traps and thermoluminescence in Li2B4O7:Be

被引：13
|
作者：
Kerikmaee, Mihkel [1 ]
Danilkin, Mikhail [1 ]
Lust, Aime [1 ]
Nagirnyi, Vitali [2 ]
Pung, Lembit [2 ]
Ratas, Arno [1 ]
Romet, Ivo [2 ]
Seeman, Viktor [2 ]
机构：
[1] Univ Tartu, Inst Chem, EE-50411 Tartu, Estonia
[2] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia
来源：
RADIATION MEASUREMENTS | 2013年 / 56卷
关键词：
Lithium tetraborate; Electron paramagnetic resonance; Thermoluminescence; Trapped-hole centres;
D O I：
10.1016/j.radmeas.2013.02.002
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 trapped-hole centre with a high thermal stability is studied in Li2B4O7:Be. EPR spectrum demonstrates a hyperfine splitting due to interaction of the trapped hole with a Be-9 nucleus. The hole is trapped at the common vertex (bridging oxygen) of two adjacent BO4 tetrahedra when Be2+ substitutes for B3+ in one of them. The centre is stable up to approximate to 500 K. The high-temperature thermoluminescence peak at 510-575 K occurs when the released holes recombine with trapped electrons. This peak shows an ultraviolet exciton-like luminescence band and also luminescence bands of casual impurities. (C) 2013 Published by Elsevier Ltd.
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页码：147 / 149
页数：3
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