Hole traps and thermoluminescence in Li2B4O7:Be

被引：14

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.

引用

页码：147 / 149

页数：3

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