Gamma irradiated thermoluminescence response of Ge-doped SiO 2 fibre
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, repr...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Published: |
Elsevier
2015
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/19487/ http://dx.doi.org/10.1016/j.apradiso.2015.08.025 |
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| Summary: | 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. |
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