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Low dose gamma irradiation effect on aluminosilicate compounds

E. VANEA1, V. SIMON1,*

Affiliation

  1. Babes-Bolyai University, Faculty of Physics & Institute for Interdisciplinary Experimental Research, Cluj-Napoca, Romania

Abstract

Iron and rare earths containing aluminosilicate systems, that may be further considered for biomedical applications, were obtained following the sol-gel route. After drying, the samples were heat-treated at 500°C or 1200°C. Because the sterilisation of such biomedical compounds is usually realized with gamma rays, the samples were gamma irradiated and investigated with respect to possible occurrence of nocuous irradiation effects. Electron paramagnetic resonance (EPR) spectroscopy was used to characterize paramagnetic centres occurring in the gamma ray irradiated samples. The EPR studies demonstrate that various radiation-induced defects, like surface defects and peroxy centres, are present in the analysed systems. A higher concentration of defects was detected for samples treated at 500°C, as compared to samples treated at 1200°C. EPR silent defects induced during sample preparation, and evidenced after gamma rays exposure, can be removed by thermal treatment applied at high temperatures..

Keywords

Aluminosilicates, Gamma irradiation, Paramagnetic centres, EPR.

Submitted at: Dec. 20, 2009
Accepted at: Feb. 18, 2010

Citation

E. VANEA, V. SIMON, Low dose gamma irradiation effect on aluminosilicate compounds, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 365-369 (2010)