Citation

Oresegun, Adebiyi and Tarif, Zubair H. and Ghassan, Louay and Zin, Hafiz and Abdul Rashid, Hairul Azhar and Bradley, D. A. (2021) Radioluminescence of cylindrical and flat Ge-doped silica optical fibers for real-time dosimetry applications. Applied Radiation and Isotopes, 176. p. 109812. ISSN 0969-8043

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Abstract

Investigation has been made of the radioluminescence dose response of Ge-doped silica flat and cylindrical fibers subjected to 6 and 10 MV photon beams. The fibers have been custom fabricated, obtaining Ge dopant concentrations of 6 and 10 mol%, subsequently cut into 20 mm lengths. Each sample has been exposed under a set of similar conditions, with use made of a fixed field size and source to surface distance (SSD). Investigation of dosimetric performance has involved radioluminescence linearity, dose-rate dependence, energy dependence, and reproducibility. Mass for mass, the 6 mol% Ge-doped samples provided the greater radioluminescence yield, with both flat and cylindrical fibers responding linearly to the absorbed dose. Further found has been that the cylindrical fibers provided a yield some 38% greater than that of the flat fibers. At 6 MV, the cylindrical fibers were also found to exhibit repeatability variation of <1%, superior to that of the flat fibers, offering strong potential for use in real-time dosimetry applications.

Item Type:	Article
Uncontrolled Keywords:	Radioluminescence, Real-time dosimetry, Optical fiber scintillator, Germanium, Radiotherapy
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	05 Aug 2021 07:57
Last Modified:	05 Aug 2021 07:57
URII:	http://shdl.mmu.edu.my/id/eprint/9034

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