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Point defects and the blue emission in fired quartz at high dose: A comparative luminescence and EPR study

MPG-Autoren
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Woda,  C.
Guest Group Archaeometry, MPI for Nuclear Physics, Max Planck Society;

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Schilles,  T.
Guest Group Archaeometry, MPI for Nuclear Physics, Max Planck Society;

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Rieser,  U.
Guest Group Archaeometry, MPI for Nuclear Physics, Max Planck Society;

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Wagner,  G. A.
Guest Group Archaeometry, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Woda, C., Schilles, T., Rieser, U., Mangini, A., & Wagner, G. A. (2002). Point defects and the blue emission in fired quartz at high dose: A comparative luminescence and EPR study. Radiation Protection Dosimetry, 100(1-4), 261-264.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0011-846D-E
Zusammenfassung
The dose response of the 375degreesC, 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.