Radioluminescence of silica optical fibre scintillators for real-time industrial radiation dosimetry


Oresegun, Adebiyi and Basaif, A. and Tarif, Zubair H. and Abdul Rashid, Hairul Azhar and Hashim, Siti Aiasah and Bradley, D. A. (2021) Radioluminescence of silica optical fibre scintillators for real-time industrial radiation dosimetry. Radiation Physics and Chemistry, 188. p. 109684. ISSN 0969-806X

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Dosimetry systems are important in any radiation facility to ensure quality, safety, validation, qualification and quality control of established and new processes, including at industrial radiation facilities. We present a study of silica optical fibre as scintillators for industrial radiation dosimetry using Radioluminescence (RL). The RL technique provides for a remote and real-time dosimetry measurement in such a high dose environment. This study establishes the dosimetric characteristics of two variants of pure silica optical fibre, low and high hydroxyl (OH) when exposed to industrial radiation levels. The samples were exposed to a linear accelerator, with doses in the order of tens of kGy (from 10 kGy through to 70 kGy in individual exposures). The performance parameters observed during the study include the RL emission spectrum, emission intensity and emission linearity with exposure dose. The RL spectrum demonstrated a central wavelength of 650 nm and 550 nm for the high and low OH scintillators, respectively. RL intensity was observed to increase with exposed dose, a result of recombination of ionizing radiation generated electron-hole pairs. The RL intensity relation with exposed dose indicated a linear response, with the higher OH sample showing the greater slope, indicating greater sensitivity. The overall results indicate the potential use of pure silica optical fibre as scintillators for remote and real-time industrial radiation dosimetry.

Item Type: Article
Uncontrolled Keywords: Radiation dosimetry, Radioluminescence, Real-time dosimetry, Optical fibre scintillator, Industrial radiation
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 Nurul Iqtiani Ahmad
Date Deposited: 05 Aug 2021 07:54
Last Modified: 05 Aug 2021 07:54


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