Thermally and optically stimulated luminescence of AlN-Y2O3 ceramics after ionising irradiation

L. Trinkler, A.J.J. Bos, A.J.M. Winkelman, P. Christensen, N. Agersnap Larsen, B. Berzina

    Research output: Contribution to journalJournal articleResearch

    Abstract

    Thermally (TL) and optically stimulated luminescence (OSL) were studied in AlN-Y2O3 ceramics after irradiation with ionising radiation. The extremely high TL sensitivity (approximately 60 times the sensitivity of LiF:Mg,Tl (TLD-100)) makes AlN-Y2O3 ceramics attractive as a TLD material. However, an essential drawback of AlN-Y2O3 is its high fading rate. Special attention has been focused on understanding and improving the fading properties. In particular, the influence of the ceramics production conditions and the additive concentration on the fading rate have been studied. Experimental results on spectral properties and thermal evolution of OSL are also presented. The stimulation spectrum covers the spectral range from green to infrared light. A combination of thermal and optical stimulation allowed a correlation to be found between parameters of OSL and TL after the same irradiation dose. It is concluded that OSL occurs due to depopulation of shallower traps than TL traps.
    Original languageEnglish
    JournalRadiation Protection Dosimetry
    Volume84
    Issue number1-4
    Pages (from-to)207-210
    ISSN0144-8420
    Publication statusPublished - 1999

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