Study of radiation induced effects in the luminescence of nanostructured Al2O3: Yb, Er crystals

被引：7
|
作者：
Goncalves, K. A. [1 ,2 ]
Bitencourt, J. F. S. [1 ,2 ]
Mittani, J. C. R.
Tatumi, S. H. [1 ,2 ]
机构：
[1] Univ Sao Paulo, Dept Engn Eletr, Av Luciano Gualberto 380, BR-05508900 Sao Paulo, Brazil
[2] Univ Sao Paulo, Dept Engn Elect, BR-05508900 Sao Paulo, SP, Brazil
来源：
11TH EUROPHYSICAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS (EURODIM 2010) | 2010年 / 15卷
基金：
巴西圣保罗研究基金会;
关键词：
THERMOLUMINESCENCE; ALPHA-AL2O3-C; ALUMINA;
D O I：
10.1088/1757-899X/15/1/012080
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Alumina crystals doped with Yb and Er were obtained by sol gel process and their morphologies and luminescence properties were discussed. Nanocrystals formations composed by Er2O3, Yb2O3 e Yb3Al5O12 were observed by TEM images, EDS, electron beam diffraction and XRD, at the surface of the alumina grains. The size of the nanocrystals were of about (36 +/- 2) nm and (182 +/- 8) nm for the samples calcinated at 1200 degrees C and 1600 degrees C, respectively. The sample codoped with 1mol% of Er and 2 mol% of Yb supplied the best results for Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). The growth intensity of dosimetric TL peak at 205 degrees C was linear with gamma radiation doses and the same behavior was observed in OSL results.
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页数：7
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