Improved real-time dosimetry using the radioluminescence signal from Al2O3:C

Sidsel Marie Skov Damkjær, Claus Erik Andersen, Marianne Aznar

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    15th International Conference on Solid State Dosimetry Location: Delft Univ Technol, Delft, NETHERLANDS Date: JUL 08-13, 2007 Abstract: Carbon-doped aluminum oxide (Al2O3:C) is a highly sensitive luminescence material for ionizing radiation dosimetry, and it is well established that the optically stimulated luminescence (OSL) signal from Al2O3:C can be used for absorbed-dose measurements. During irradiation, Al2O3:C also emits prompt radjoluminescence (RL) which allows for real-time dose verification. The RL-signai is not linear in the absorbed dose due to sensitivity changes and the presence of shallow traps. Despite this the signal can be processed to obtain a reliable dose rate signal in real time. Previously a simple algorithm for correcting the RL-signal has been published and here we report two improvements: a better and more stable calibration method which is independent of a reference dose rate and a correction for the effect of the shallow traps. Good aoreement was found between reference doses and doses derived from the RL-signal using the new algorithm (the Standard deviation of the residuals were similar to 2% including phantom positioning errors). The RL-algorithm was found to greatly reduce the influence of shallow traps in the range from 0 to 3 Gy and the RL dose-rate measurements with a time resolution of 0. 1 s closely matched dose-rate changes monitored with in ionization chamber. (c) 2007 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    JournalRadiation Measurements
    Issue number2-6
    Pages (from-to)893-897
    Publication statusPublished - 2008
    EventSolid State Dosimetry Conference - Delft, Netherlands
    Duration: 8 Jul 200713 Jul 2007
    Conference number: 15


    ConferenceSolid State Dosimetry Conference


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