Rahman, Ahmad Taufek Abdul and Abu Bakar, Noor Khairunnisa and Paul, Mukul Chandra and Bradley, D A (2014) Ultraviolet radiation (UVR) dosimetry system and the use of Ge-doped silica optical fibres. Radiation Physics and Chemistry, 104. pp. 129-133. ISSN 0969-806X

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Abstract

Previous studies have shown that over exposure to ultraviolet radiation (UVR), either from sunlight or artificial sources, can cause severe biological effects including cataracts, photokeratitis and skin cancer. In this respect, there exists the need to introduce a sensitive UV dosimetric material capable of measuring radiation dose to high accuracy in order to deliver UVR safely and efficiently. Present study has focussed on the investigation of the potential thermoluminescent (TL) sensitivity of commercially available germanium (Ge)-doped silica (SiO2) optical fibres subjected to UVR. The main interest of this study is to find out whether these doped SiO2 optical fibres can be used as a sensible integrator of environmental UV exposures. In the present study, commercially available Ge-doped SiO2 optical fibres have been used with a core diameter of 11 mu m (CorActive, Canada), 23 mu m (Central Glass and Ceramic Research Institute Kolkata, India) and 50 mu m (Central Glass and Ceramic Research Institute Kolkata, India) and a cladding diameter of 125 +/- 0.1 mu m, irradiated over a wide range of UV dose. Results have shown that these fibres exhibit a linear dose response (with correlation coefficient better than 0.9852). The 50 mu m fibre produces greater TL response than that obtained for 11- and 23 mu m fibres. The TL, results are compared with that of the well-established TL dosimeter material lithium fluoride. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Article
Additional Information:	1st International Conference on Dosimetry and its Applications (ICDA), Prague, CZECH REPUBLIC, JUN 23-28, 2013
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	18 Nov 2014 10:37
Last Modified:	25 Nov 2014 10:49
URI:	http://cgcri.csircentral.net/id/eprint/2542

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