[H2O-]z centres in LiF:OH- crystals

被引：1
|
作者：
Courrol, LC [1 ]
Gomes, L [1 ]
机构：
[1] IPEN CNEN SP, BR-05422 SAO PAULO, BRAZIL
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1997年 / 58卷 / 02期
关键词：
optical materials; luminescence; colour centres; defects; optical properties;
D O I：
10.1016/S0022-3697(96)00125-4
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Electron-irradiated LiF:OH- crystals at -30 degrees C exhibited a new centre absorbing in the region of F-z centre at 380 nm. The kinetics of defect formation and destruction suggest that both OH- and Mg++ impurities must be present in the host to propitiate its production. The isomorphism between the observed excitation spectra of this centre with the absorption of H2O- centres in alkali chlorides and bromides crystals, suggested that it must be of the same nature, i.e. a 'wet F-z centre', although more stable due to the intrinsic Mg++ effects. (C) 1997 Elsevier Science Ltd. All rights reserved.
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页码：281 / 286
页数：6
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