Gamma irradiated thermoluminescence response of Ge-doped SiO 2 fibre

Wahib, N. and Zulkepely, N.N. and Mat Nawi, S.N. and Amin, Y.M. and Ling, Y.S. and Abdul Sani, S.F. and Maah, M.J. and Bradley, D.A. (2015) Gamma irradiated thermoluminescence response of Ge-doped SiO 2 fibre. Applied Radiation and Isotopes, 105. pp. 158-162. ISSN 0969-8043, DOI

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Over the past decade and more, considerable interest has been shown in the thermoluminescence (TL) properties of silica-based single-mode optical fibres, in particular investigating potential ionising radiation dosimetry applications. Herein, study has been made of TL glow curve, dose response, reproducibility and fading of 6. mol% Ge-doped silica, fabricated in-house and produced in the form of cylindrical fibres. Three different pairings of doped-core and silica cladding diameters were produced: (40, 241). μm, (80, 483). μm and (100, 604). μm. The TL results were compared against that of TLD-100, one of the most sensitive commercially available LiF-based TL media. For all three pairings of diameters, closely similar TL glow curve were obtained, formed of a single peaked structure with a maximum TL yield located between the temperatures 250 and 310. °C. The TL yield of the fibres were linear over the range of doses investigated, from 1. Gy up to 10. Gy, their dose response exceeding that of TLD-100, the samples also being found to be reusable, without evidence of degradation.

Item Type: Article
Funders: Ministry of Higher Education (MOHE) of Malaysia: a research Grant (UM.C/HIR/MOHE/SC/33), University of Malaya: Postgraduate Research Grant, PPP (PG120-2014A)
Uncontrolled Keywords: Ge-doped optical fibre; TL (thermoluminescence); Reproducibility; Fading
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 01 Oct 2018 01:55
Last Modified: 01 Oct 2018 01:55

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