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Development of an ICCD-scintillator system for measurement of spatial dose distributions around 'hot particles'
A Sh Aydarous1, P J Darley, M W Charles
1Physics and Mathematics Department, Faculty of Science, University of Umm Al-Qura, Al-Hawiah, Taif, P.O. Box 5700, Kingdom of Saudi Arabia. Aydarous@hotmail.com
Abstract:
An intensified charge coupled device (ICCD)-scintillator system has been investigated for potential use in measuring the spatially non-uniform dose distribution around 'hot particles'. This imaging system is capable of producing real-time measurements considerably quicker than other presently available radiation dosimetry techniques and exhibits good linearity and reproducibility and relatively high spatial resolution (approximately 17.5 microm). The time required for a dose evaluation is less than a hundredth that required for radiochromic dye film measurements. The non-uniformity of the system has been eliminated by applying pixel-to-pixel correction factors. The measurable dose rate range using a 110 microm thick scintillator extends from approximately 2000 down to approximately 6 Gy h(-1). The prototype ICCD-scintillator system has been used in evaluation of the skin dose from some high-activity nuclear fuel fragments. The results agree within a few percentage with radiochromic dye film measurements for 1 cm(2) averaging areas.
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