Influence of the stem effect on radioluminescence signals from optical fibre Al2O3:C dosemeters

C.J. Marckmann, M.C. Aznar, C.E. Andersen, L. Bøtter-Jensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    This paper analyses the influence of the Cerenkov radiation and other noise sources, the so-called stem effect, on radioluminescence (RL) signals generated in optical fibre Al2O3:C dosemeters used in medical dosimetry. The optical fibre dosemeter consists of a sensitive Al2O3:C crystal coupled to an optical fibre cable that carries the RL and optically stimulated luminescence (OSL) signals generated in the Al2O3:C crystal. During irradiation of the dosemeter, the real-time dose rate can be determined from the RL signal and after irradiation the total dose absorbed is determined from the OSL signal stimulated using a focused green solid-state laser. In particular, the components of the stem effect generated in the fibres were analysed to determine their impact on the RL signal.
    Original languageEnglish
    JournalRadiation Protection Dosimetry
    Volume119
    Issue number1-4
    Pages (from-to)363-367
    ISSN0144-8420
    DOIs
    Publication statusPublished - 2006

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