Luminescence sensitivity changes in quartz as a result of annealing

L. Bøtter-Jensen, N. Agersnap Larsen, V. Mejdahl, N.R.J. Poolton, M.F. Morris, S.W.S. McKeever

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Retrospective dosimetry using optically stimulated luminescence (OSL) on quartz extracted from (for example) bricks needs to account for strong OSL sensitivity changes that are known to occur depending on the previous thermal treatment of the sample. Non-heated quartz exhibits OSL orders of magnitude less per unit radiation than that for heated material. The reason these temperature-induced sensitivity changes occur in quartz is presently not well understood. This phenomenon is also seen in the related area of luminescence dating in which sedimentary quartz and quartz from heated archaeological samples show very different OSL sensitivities. In this paper we report on studies of the effect of high temperature annealing on the OSL and phototransferred TL (PTTL) signals from sedimentary and synthetic quartz. A dramatic enhancement of both OSL and PTTL sensitivity was found especially in the temperature range 500-800 degrees C. Computer simulations of the possible effects are shown to produce data that agree in all essential details with the experimental observations. It is further demonstrated that the enhanced OSL sensitivity as a function of annealing temperature is not a pre-dose effect.
    Original languageEnglish
    JournalRadiation Measurements
    Volume24
    Issue number4
    Pages (from-to)535-541
    ISSN1350-4487
    DOIs
    Publication statusPublished - 1995
    EventInternational Symposium on Luminescent Detectors and Transformers of Ionizing Radiation - Tallinn, Estonia
    Duration: 25 Sep 199428 Sep 1994

    Conference

    ConferenceInternational Symposium on Luminescent Detectors and Transformers of Ionizing Radiation
    CountryEstonia
    CityTallinn
    Period25/09/199428/09/1994
    SponsorUniversity of Tartu, Bicron Technologies Vertriebs GmbH, Victoreen Inc., Estonian Academy of Sciences

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