Investigation on various types of silica fibre as thermoluminescent sensors for ultra-high dose radiation dosimetry

Moradi, Farhad and Mahdiraji, Ghafour Amouzad and Khandaker, Mayeen Uddin and Ung, Ngie Min and Adikan, Faisal Rafiq Mahamd and Khellaf, Imene and Bradley, D.A. (2018) Investigation on various types of silica fibre as thermoluminescent sensors for ultra-high dose radiation dosimetry. Sensors and Actuators A: Physical, 273. pp. 197-205. ISSN 0924-4247

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Official URL: https://doi.org/10.1016/j.sna.2018.02.024

Abstract

With high-dose applications lacking the benefit of an economic yet versatile dosimeter that provides for a wide dynamic dose range, ongoing research is seeking to introduce suitable thermoluminescent (TL) material for such needs. Acknowledging the high potential of silica fibres, as developed by members of this group over the past few years, in present work evaluation has been made of 13 types of fibre, differing in dopant, dopant concentration and diameter including P−, Al−, Er−, Ge− and Al-Tm-doped fibres, ultra-high numerical aperture and borosilicate fibre, and two non-doped fibres, quartz and suprasil F300. Evaluation is made in terms of TL response to photon and electron irradiations with the objective of determining a TL material that can offer sensitive yet extended dose capability, saturating only above the few tens of kGy range. The various silica fibres that have been investigated were found to show saturation levels from 5 kGy for Ge-doped fibre (4 mol %) to 80 kGy for 2 mol % Al−doped silica fibre. Borosilicate fibres demonstrated the greatest potential for high dose dosimetry, maintaining a highly-linear response, any tendency towards saturation only being indicated to beyond receipt of doses of 100 kGy. For this fibre type detailed TL characterizations were conducted, including glow curve analysis, reproducibility and fading tests. The results suggest borosilicate fibre to be suitable for high dose TL dosimetry, providing sufficient sensitivity and appropriate dosimetric characteristics.

Item Type: Article
Uncontrolled Keywords: High dose dosimetry; Silica fibre; Thermoluminescent dosimeter; Glow curve
Subjects: Q Science > QC Physics
R Medicine
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Medicine
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 13 May 2019 05:12
Last Modified: 13 May 2019 05:12
URI: http://eprints.um.edu.my/id/eprint/21219

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