Resumo

OSORIO, Amalia; SALCEDO, Juana  e  COGOLLO, Rafael. Al₂O₃ sintered pellets as thermoluminescent dosimeters. ing.cienc. [online]. 2012, vol.8, n.15, pp.47-64. ISSN 1794-9165.

Verification of the radiation doses received by the area exposed during medical treatment is essential for assessing any scheme radiotherapy. This work describes the characteristic thermoluminescent (TL) of sintered Al₂O₃ pellets, for its use as dosimeter dose low. Sintered Al₂O₃pellets under different calcinations with a diameter of 5 mm and a thickness of 1 mm, they were irradiated to different dose using an unit of ⁶⁰Co Theratron 780C^® in air to ambient temperature. The reading was carried in a Harshaw TLD 4500. The main dosimetric properties of the material (glow curve, response reproducibility, reutilization, linearity and fading) have been studied in detail. The glow curve of the thin sintered Al₂O₃ pellets presents an intense peak TL to about 165 °C, which can be used for dosimetry. The results show that the pellets can be used in quality control programs as thermoluminescent dosimeter in therapeutic dose range. The importance of this work is that the aluminum oxide (α-Al₂O₃) is a promising alternative in TL materials used for dosimetry "in vivo" within quality control programs.

Palavras-chave : Al₂O₃; dosimetry; thermoluminescence.

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