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Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation

Determination is made of glow curves attributes of Ge-doped silica fibres fabricated from Ge-doped preforms. In particular interest is in Ge-doped cylindrical (Ge-CF) and Ge-doped flat (Ge-FF). The fabrications are irradiated using various ionizing radiation sources types, protons (150 MeV, 210 MeV)...

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Main Authors: Kandan, V., Hassan, M. F., Omar, N., Shahar, H. K., Mohamad, F., Karim, M. K. Abdul, Sani, S. F. Abdul, Bradley, D. A., Noor, N. Mohd
Format: Article
Published: Pergamon-Elsevier Science Ltd 2021
Subjects:
QC Physics
QD Chemistry
Online Access:http://eprints.um.edu.my/34196/
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spelling my.um.eprints.341962022-06-13T08:10:47Z http://eprints.um.edu.my/34196/ Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation Kandan, V. Hassan, M. F. Omar, N. Shahar, H. K. Mohamad, F. Karim, M. K. Abdul Sani, S. F. Abdul Bradley, D. A. Noor, N. Mohd QC Physics QD Chemistry Determination is made of glow curves attributes of Ge-doped silica fibres fabricated from Ge-doped preforms. In particular interest is in Ge-doped cylindrical (Ge-CF) and Ge-doped flat (Ge-FF). The fabrications are irradiated using various ionizing radiation sources types, protons (150 MeV, 210 MeV), 6 and 10 MV photons, 6 MeV electrons, and Co-60 gammas (mean energy 1.25 MeV), all at a constant dose of 5 Gy. The fibres have been fabricated using the MCVD technique, notably with a Ge-CF having a larger core compared to the commercial cylindrical fibres (CF). Using WinGCF software the glow curves have been deconvolved, revealing five contributory glow peaks, evaluation being made of three kinetic parameters: maximum temperature (T-max), activation energy (E-a) and peak integral (PI). Ge-CF E-a and PI values are found to be greater than those for Ge-FF. Moreover, for Ge-CF, the activation energy for electromagnetic irradiation (gamma photons) achieves a maximum reading at peak number 3 while its PI is found to be the least. The PI for photon irradiation is shown to be greater than that for electron and proton irradiation. For Ge-FF, E-a again achieves its greatest value at peak 3, the PI being maximum at peak 2 and least at peak 3. Particle irradiations are more greatly associated with deeper trapping levels. Additionally, the overall conclusion is that Ge-CF offers superior TL yield to that of Ge-FF. One-way analysis of variance (ANOVA) for the individual peaks shows there to be significant differences in terms of PI and E-a, p < 0.05 for all types of radiation, but weakly significant in terms of T-max for both types of fibres (p < 0.05), mostly for proton and photon irradiation. Pergamon-Elsevier Science Ltd 2021-01 Article PeerReviewed Kandan, V. and Hassan, M. F. and Omar, N. and Shahar, H. K. and Mohamad, F. and Karim, M. K. Abdul and Sani, S. F. Abdul and Bradley, D. A. and Noor, N. Mohd (2021) Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation. Radiation Physics and Chemistry, 178 (SI). ISSN 0969-806X, DOI https://doi.org/10.1016/j.radphyschem.2020.108981 <https://doi.org/10.1016/j.radphyschem.2020.108981>. 10.1016/j.radphyschem.2020.108981
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
QD Chemistry
spellingShingle QC Physics
QD Chemistry
Kandan, V.
Hassan, M. F.
Omar, N.
Shahar, H. K.
Mohamad, F.
Karim, M. K. Abdul
Sani, S. F. Abdul
Bradley, D. A.
Noor, N. Mohd
Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
description Determination is made of glow curves attributes of Ge-doped silica fibres fabricated from Ge-doped preforms. In particular interest is in Ge-doped cylindrical (Ge-CF) and Ge-doped flat (Ge-FF). The fabrications are irradiated using various ionizing radiation sources types, protons (150 MeV, 210 MeV), 6 and 10 MV photons, 6 MeV electrons, and Co-60 gammas (mean energy 1.25 MeV), all at a constant dose of 5 Gy. The fibres have been fabricated using the MCVD technique, notably with a Ge-CF having a larger core compared to the commercial cylindrical fibres (CF). Using WinGCF software the glow curves have been deconvolved, revealing five contributory glow peaks, evaluation being made of three kinetic parameters: maximum temperature (T-max), activation energy (E-a) and peak integral (PI). Ge-CF E-a and PI values are found to be greater than those for Ge-FF. Moreover, for Ge-CF, the activation energy for electromagnetic irradiation (gamma photons) achieves a maximum reading at peak number 3 while its PI is found to be the least. The PI for photon irradiation is shown to be greater than that for electron and proton irradiation. For Ge-FF, E-a again achieves its greatest value at peak 3, the PI being maximum at peak 2 and least at peak 3. Particle irradiations are more greatly associated with deeper trapping levels. Additionally, the overall conclusion is that Ge-CF offers superior TL yield to that of Ge-FF. One-way analysis of variance (ANOVA) for the individual peaks shows there to be significant differences in terms of PI and E-a, p < 0.05 for all types of radiation, but weakly significant in terms of T-max for both types of fibres (p < 0.05), mostly for proton and photon irradiation.
format Article
author Kandan, V.
Hassan, M. F.
Omar, N.
Shahar, H. K.
Mohamad, F.
Karim, M. K. Abdul
Sani, S. F. Abdul
Bradley, D. A.
Noor, N. Mohd
author_facet Kandan, V.
Hassan, M. F.
Omar, N.
Shahar, H. K.
Mohamad, F.
Karim, M. K. Abdul
Sani, S. F. Abdul
Bradley, D. A.
Noor, N. Mohd
author_sort Kandan, V.
title Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
title_short Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
title_full Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
title_fullStr Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
title_full_unstemmed Advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
title_sort advanced glow curve analysis of fabricated fibres for various sources of ionizing radiation
publisher Pergamon-Elsevier Science Ltd
publishDate 2021
url http://eprints.um.edu.my/34196/
_version_ 1735570298450739200
score 13.211869

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