Thermoluminescence induced by UV radiation in mixed systems of ZrO2-La2O3 AND ZrO2 -CeO2
In the study of the properties of the ceramic materials has been observed that some of them, such as TiO2, Al2O3, ZrO2, La2O3 and CeO2, are highly sensible to the ultraviolet radiation (UV); this characteristic can be taken as an advantage to detect this kind of radiation. The present work presents preliminary results obtained in the UV-induced thrmoluminescence (TL) response in mixed systems of ZrO2-La2O3 and ZrO2-CeO2 which were obtained by the Sol-Gel method. The originality of this contribution is that this mixed systems has not been synthesized and studied on its properties presented here. The first system presents high sensibility to the UV radiation with a TL curve formed mainly by two peaks localized at 70 °C and 140 °C; a third less intense peak at 255 °C was obtained too. On the other hand, the mixed system of ZrO2-CeO2 shows less sensibility with a TL curve formed by two peaks localized at 60 °C and 140 °C. With respect to the stability signal at environmental temperature, it can be observed, in both materials the signal vanishes for the peak at low temperature during the first minutes after the irradiation time, while the second peak have higher stability. According to the sensibility and stability of the signal associated to the ZrO2-La2O3 indicate that this system would be a promising for dosimetric applications in UV radiation fields.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Universidad Simón Bolívar
2003
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| Online Access: | http://ve.scielo.org/scielo.php?script=sci_arttext&pid=S0255-69522003000100009 |
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