Conference paper · Journal article
Improved real-time dosimetry using the radioluminescence signal from Al2O3:C
Radiation Physics, Radiation Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Radiation Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
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.
Language: | English |
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Year: | 2008 |
Pages: | 893-897 |
Proceedings: | Solid State Dosimetry Conference |
ISSN: | 13504487 and 18790925 |
Types: | Conference paper and Journal article |
DOI: | 10.1016/j.radmeas.2007.11.052 |
ORCIDs: | Andersen, Claus Erik |