Passive dosimetry of electron irradiated borosilicate glass slides

Sani, S.F. A. and Othman, M.H.U. and Alqahtani, A. and Nazeri, A.A.Z. A. and Almugren, K.S. and Ung, N.M. and Hashim, S.A. and Alkallas, F.H. and Bradley, D.A. * (2021) Passive dosimetry of electron irradiated borosilicate glass slides. Radiation Physics and Chemistry, 178. p. 108903. ISSN 0969-806X

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Thermoluminescence dosimetry most typically concerns the sensing and quantification of ionizing radiation exposures, with evaluation of absorbed dose arising from electron-hole trapping in well-disposed insulating/semi-conducting media. In this passive form of dosimetry the signal derives from photons released post-irradiation heating of the dosimeter over a specific temperature range. Herein, for entrance doses from 2 Gy up to 250 kGy, investigation is made of the thermoluminescence properties of electron irradiated borosilicate glass (SiO2–B2O3), the samples deriving from commercial microscope slides (coverslips) of thickness 1.0 mm. The coverslips provide linear TL response over a wide range of radiation dose, through use of a clinical linear accelerator in a lower dose regime (2–10 Gy) and use of a product-irradiation electron linac in a higher dose regime (25 kGy–250 kGy), obtaining a regression coefficient in excess of 96%. In the high dose regime comparison has been made with the response of Ge–B doped Flat Fibre (FF) and Ge–B doped photonic crystal fibre (PCF) (collapsed). Deconvolution shows the glow curves of the borosilicate glass to be formed of five overlapping peaks, with figures of merit (FOM) of between 0.62 – 1.72 and 0.87–1.00 for the particular dose ranges 2–10 Gy and 25 kGy–250 kGy respectively. Through use of Glowfit deconvolution software, the key trapping parameters of activation energy and frequency factor were calculated for the borosilicate glass slide.

Item Type: Article
Uncontrolled Keywords: Thermoluminescent (TL); Borosilicate glass slide; Electron irradiation; Glow curve
Subjects: R Medicine > R Medicine (General) > R895-920 Medical Physics/Medical Radiology
Divisions: Others > Non Sunway Academics
Sunway University > School of Medical and Life Sciences [formerly School of Healthcare and Medical Sciences until 2020] > Centre of Biomedical Physics [wef 2021 changed to Research Centre for Applied Physics and Radiation Technologies and moved to SET ]
Depositing User: Dr Janaki Sinnasamy
Related URLs:
Date Deposited: 15 Feb 2021 04:53
Last Modified: 15 Feb 2021 04:53

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