title: Gamma irradiated thermoluminescence response of Ge-doped SiO2 fibre.
abstract: 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 6mol% 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 1Gy up to 10Gy, their dose response exceeding that of TLD-100, the samples also being found to be reusable, without evidence of degradation.
authors: Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: norfadirawahib@gmail.com.
authors: Norfadira
authors: N
authors: Wahib
authors: Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: Nurul Najua
authors: NN
authors: Zulkepely
authors: Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: Siti Nurasiah
authors: SN
authors: Mat Nawi
authors: Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: Yusoff Mohd
authors: YM
authors: Amin
authors: Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: Yap Seong
authors: YS
authors: Ling
authors: Department of Physics, University of Surrey, Guildford GU2 7XH, UK.
authors: Siti Fairus
authors: SF
authors: Abdul Sani
authors: Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: Mohd Jamil
authors: MJ
authors: Maah
authors: Department of Physics, University of Surrey, Guildford GU2 7XH, UK.
authors: D A
authors: DA
authors: Bradley
keywords: Fading; Ge-doped optical fibre; Reproducibility; TL (thermoluminescence)