Towards the development of doped silica radioluminescence dosimetry


Bradley, D. A. and Zubair, H. T. and Oresegun, A. and Louay, G. T. and Abdul-Rashid, H.A. and Ung, N. M. and Alzimami, Khalid S. (2019) Towards the development of doped silica radioluminescence dosimetry. Radiation Physics and Chemistry, 154. pp. 46-52. ISSN 0969-806X

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We discuss recent investigations by members of this group concerning the performance of P-doped silica for radioluminescence-based dosimetry. Comparisons are made against that of an in-house developed Ge-doped silica system and carbon-doped alumina (Al2O3:C). The readout obtained for dose-rate evaluations herein make use of the phenomena of radioluminescence (RL), which is enabled by defects giving rise to electron trapping. We have compared the RL signal originating from our Ge- and P-doped silica optical fibres (doping of Ge and P being the primary sources of defects in the silica media) and commercial nanoDot Al2O3:C dosimeters, the RL signal being guided through PMMA optical fibres to obtain real-time measurements. In regard to afterglow, the P-doped fibre retains the least memory of prior irradiation, favouring its use in real-time evaluations in the use of pulsed beams, improving upon the performance of the Ge-doped fibre.

Item Type: Article
Uncontrolled Keywords: radiation dosimetry, P- and Ge-doped silica, Radioluminescence
Subjects: Q Science > QC Physics > QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity > QC794.95-798 Radioactivity and radioactive substances
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 02 Dec 2020 17:43
Last Modified: 02 Dec 2020 17:43


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