Developments in production of silica based thermoluminescence dosimeter

D.A, Bradley and Ahmad Shaharuddin, Siti Shafiqah and Z, Siti Rozaila and Sabtu, Siti Norbaini and S.F., Abdul Sani and Abdulaziz, H. Alanazi and S.M, S.M Jafari and G.Amouzad, Mahdiraji and F.R, Mahamad Adikan and M.J, Maah and A.N, Nisbet and N, Tamchek and H.A, Hairul Rashid and M, Alkhorayef and K, Alzimami (2017) Developments in production of silica based thermoluminescence dosimeter. Radiation Physics and Chemistry, 137. pp. 37-44. ISSN 0969-806X

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Abstract

This work addresses purpose-made thermoluminescence dosimeters (TLD) based on doped silica fibres and sol–gel nanoparticles, produced via Modified Chemical Vapour Deposition (MCVD) and wet chemistry techniques respectively. These seek to improve upon the versatility offered by conventional phosphor-based TLD forms such as that of doped LiF. Fabrication and irradiation-dependent factors are seen to produce defects of differing origin, influencing the luminescence of the media. In coming to a close, we illustrate the utility of Ge-doped silica media for ionizing radiation dosimetry, first showing results from gamma-irradiated Ag-decorated nanoparticles, in the particular instance pointing to an extended dynamic range of dose. For the fibres, at radiotherapy dose levels, we show high spatial resolution (0.1 mm) depth-dose results for proton irradiations. For novel microstructured fibres (photonic crystal fibres, PCFs) we show first results from a study of undisturbed and technologically modified naturally occurring radioactivity environments, measuring doses of some 10 s of μGy over a period of several months.

Item Type:	Article (Journal)
Additional Information:	7747/55558
Uncontrolled Keywords:	Production of silica; Thermoluminescence dosimeter
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	DR Siti Shafiqah Binti Ahmad Shaharuddin
Date Deposited:	13 Feb 2017 17:08
Last Modified:	18 Apr 2018 11:26
URI:	http://irep.iium.edu.my/id/eprint/55558

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