High concentrations of aggregate colour centres in heavily irradiated LiF crystals

被引：21
作者：
Baldacchini, G [1 ]
Bonfigli, F [1 ]
Menchini, F [1 ]
Montereali, RM [1 ]
机构：
[1] ENEA, Div Appl Phys, I-00060 Rome, Italy
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2002年 / 191卷
关键词：
lithium fluoride; colour centres; optical absorption; photoluminescence;
D O I：
10.1016/S0168-583X(02)00562-1
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The stable formation of several colour centres (CCs) has been investigated in lithium fluoride (LiF) single crystals irradiated at room temperature (RT) and at 213 K by 5 MeV electrons with doses from 10(19) to 10(23) eV/cm(3). The temperature during irradiation influences the production of aggregate defects, in particular the ratio between the F(3)(2) and F(2) laser active centres and the amount of parasitic complex defects. Optical absorption and photoluminescence spectra allow clarifying the role of different aggregate defects on the emission properties of the F(3)(-) and F(2) centres at concentrations up to 10(18) cm(-3). (C) 2002 Published by Elsevier Science B.V.
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收藏
页码：216 / 220
页数：5
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