Influence of Teflon ® agglutinator on TLD spodumene pellets

• Published in: Journal of luminescence 2012-02, Vol.132 (2), p.266-269
• Main Authors: d'Amorim, R.A.P.O., Teixeira, M.I., Souza, S.O., Sasaki, J.M., Caldas, L.V.E.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dosimetry; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other luminescence and radiative recombination; Physics; Spodumene; Teflon; Thermoluminescence
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2011.08.012

The possibility of using different materials for thermoluminescent dosimetry agglutinating their powder with Teflon ® (a polymer) has been studied in recent years. In this paper the thermoluminescent properties of spodumene-Teflon ® composites were studied exposing them to different doses of a 60Co radiation source, in comparison to the thermoluminescent properties of crystalline powder and of Teflon. The thermoluminescent emission curve of pure Teflon ® pellets showed two peaks at 200 and 250 °C at doses above 1 kGy, which may influence the dosimetry of high-doses that uses crystals agglutinated with this polymer. Preliminary results show that the Teflon ® causes an increased sensitivity in the TL signal of the pellet compared to the crystalline powder without the polymer, and that even the pure Teflon ® pellet is a material that can be exploited for high-doses dosimetry. ► Teflon ® pellet is a material that can be exploited for high-doses dosimetry. ► Pure Teflon ® pellets showed two TL peaks at doses above 1 kGy. ► High-doses dosimetry with pellets agglutinated with Teflon ® may be influenced by it. ► Teflon ® may cause an increased sensitivity in the TL signal of the pellet.