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  • Title: Point defects and the blue emission in fired quartz at high doses: a comparative luminescence and EPR study.
    Author: Woda C, Schilles T, Rieser U, Mangini A, Wagner GA.
    Journal: Radiat Prot Dosimetry; 2002; 100(1-4):261-4. PubMed ID: 12382873.
    Abstract:
    The dose response of the 375 degrees C. 470 nm TL peak in fired quartz is studied by using thermoluminescence emission spectra and monochromatic glow curves. The blue emission displays a significant sensitivity increase for doses in excess of 1000 Gy, subsequent saturation at 16 kGy and a pre-dose effect over the entire dose range. Comparison with the growth of the known electron paramagnetic resonance (EPR) centres and radioluminescence emission spectra indicates that the [AlO4] centre is the recombination site for the blue emission, whereas the electron trap remains unknown. The sensitivity change seems to be linked to the dose-induced reduction of the [GeO4/Li] centre. Possible mechanisms for the observed dose response are discussed.
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