Luminescence quenching by iron in calcium aluminoborate glasses

被引：17

作者：

Pascoal, HB ^{[1
]}

Pontuschka, WM ^{[1
]}

Rechenberg, H ^{[1
]}

机构：

[1] USP, Inst Fis, BR-05389970 Sao Paulo, SP, Brazil

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1999年 / 258卷 / 1-3期

关键词：

D O I：

10.1016/S0022-3093(99)00552-9

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of iron content and of composition on the boron oxygen hole center (BOHC) in calcium aluminoborate glasses gamma-irradiated with 10(7) R have been analyzed by thermoluminescence (TL), electron paramagnetic resonance (EPR), optical absorption and Mossbauer spectroscopy, It was observed that the Fe2+ in tetrahedral coordination inhibits the formation of the boron oxygen hole center during the irradiation through the capture of a hole resulting in quenching of the thermoluminescence observed between 350 and 670 K. These results are different from the thermoluminescence quenching observed at low temperature [S.M. Del Nery, W.M. Pontuschka, S. Isotani, C.G. Rouse, Phys. Rev. B 49 (1994) 3760] that was attributed to non-radiative recombinations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：92 / 97

页数：6

共 18 条

[1] HIGH-TEMPERATURE OPTICAL-SPECTRA OF SODA LIME SILICA GLASSES AND MODELIZATION IN VIEW OF ENERGETIC APPLICATIONS [J].