Measurement of a wide-range of X-ray doses using specialty doped silica fibres


Abdul Sani, S. F. and Hammond, R. and Jafari, S. M. and Wahab, Norfadira and Amouzad Mahdiraji, G. and Siti Shafiqah, A. S. and Abdul Rashid, Hairul Azhar and Maah, M. J. and Aldousari, H. and Alkhorayef, M. and Alzimami, M. and Bradley, D. A. (2017) Measurement of a wide-range of X-ray doses using specialty doped silica fibres. Radiation Physics and Chemistry, 137. pp. 49-55. ISSN 0969-806X

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Using six types of tailor-made doped optical fibres, we carry out thermoluminescent (TL) studies of X-rays, investigating the TL yield for doses from 20 mGy through to 50 Gy. Dosimetric parameters were investigated for nominal 8 wt% Ge doped fibres that in two cases were co-doped, using B in one case and Br in the other. A comparative measurement of surface analysis has also been made for non-annealed and annealed capillary fibres, use being made of X-ray Photoelectron Spectroscopy (XPS) analysis. Comparison was made with the conventional TL phosphor LiF in the form of the proprietary product TLD-100, including dose response and glow curves investigated for X-rays generated at 60 kVp over a dose range from 2 cGy to 50 Gy. The energy response of the fibres was also performed for X-rays generated at peak accelerating potentials of 80 kVp, 140 kVp, 250 kVp and 6 MV photons for an absorbed dose of 2 Gy. Present results show the samples to be suitable for use as TL dosimeters, with good linearity of response and a simple glow curve (simple trap) distribution. It has been established that the TL performance of an irradiated fibre is not only influenced by radiation parameters such as energy, dose-rate and total dose but also the type of fibre.

Item Type: Article
Uncontrolled Keywords: Fiber optics, Thermoluminescent, Dosimetry, Optical Fibres, X-ray photoelectron spectroscopy
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 25 Oct 2020 14:06
Last Modified: 25 Oct 2020 14:06


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