Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres
Glow curve is a key element in thermoluminescence (TL) studies as it provides on-the-ground understanding on the trapping mechanism inside the crystal lattice and hence stability of the TL material. In the present work, luminescence mechanism of the in-house fabricated germanium doped (Ge-doped) flat...
| Main Authors: | , , , , , |
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| Format: | Article |
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Elsevier
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/110536/ |
| _version_ | 1848865542372327424 |
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| author | Hassan, M.F. Rahman, W.N. Akagi, T. Sulaiman, N.S. Bradley, D.A. Noor, N.M. |
| author_facet | Hassan, M.F. Rahman, W.N. Akagi, T. Sulaiman, N.S. Bradley, D.A. Noor, N.M. |
| author_sort | Hassan, M.F. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Glow curve is a key element in thermoluminescence (TL) studies as it provides on-the-ground understanding on the trapping mechanism inside the crystal lattice and hence stability of the TL material. In the present work, luminescence mechanism of the in-house fabricated germanium doped (Ge-doped) flat-shape silica optical fibres have been investigated following irradiation by 150-MeV proton beams. Results of TL dose-response showed that there is a linear relationship between TL response and proton doses from 1 to 10 Gy, with a coefficient of determination close to one. The structure of glow curve remains unchanged throughout the studied dose range with a maximum glow peak dominated at temperature of within 250–290 ◦C. A Tmax-Tstop plot reveals not only horizontal regions but also smooth slopes, indicative of the presence of a continuum distribution of glow peaks and trap depth. A computerised glow curve deconvolution analysis of the respective fibre glow-curves demon-strated that they were composed of five strongly overlapping peaks underlying a broad TL spectrum, obtaining figures of merit in the range of 0.56–1.64. The main physical kinetic parameters (activation energy and fre-quency factor) of the fitted glow peaks were obtained using GlowFit software. The data suggest that the TL glow peaks of the Ge-doped silica optical fibres obey second-order kinetics. |
| first_indexed | 2025-11-15T14:06:22Z |
| format | Article |
| id | upm-110536 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:06:22Z |
| publishDate | 2022 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1105362024-05-27T08:21:57Z http://psasir.upm.edu.my/id/eprint/110536/ Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres Hassan, M.F. Rahman, W.N. Akagi, T. Sulaiman, N.S. Bradley, D.A. Noor, N.M. Glow curve is a key element in thermoluminescence (TL) studies as it provides on-the-ground understanding on the trapping mechanism inside the crystal lattice and hence stability of the TL material. In the present work, luminescence mechanism of the in-house fabricated germanium doped (Ge-doped) flat-shape silica optical fibres have been investigated following irradiation by 150-MeV proton beams. Results of TL dose-response showed that there is a linear relationship between TL response and proton doses from 1 to 10 Gy, with a coefficient of determination close to one. The structure of glow curve remains unchanged throughout the studied dose range with a maximum glow peak dominated at temperature of within 250–290 ◦C. A Tmax-Tstop plot reveals not only horizontal regions but also smooth slopes, indicative of the presence of a continuum distribution of glow peaks and trap depth. A computerised glow curve deconvolution analysis of the respective fibre glow-curves demon-strated that they were composed of five strongly overlapping peaks underlying a broad TL spectrum, obtaining figures of merit in the range of 0.56–1.64. The main physical kinetic parameters (activation energy and fre-quency factor) of the fitted glow peaks were obtained using GlowFit software. The data suggest that the TL glow peaks of the Ge-doped silica optical fibres obey second-order kinetics. Elsevier 2022-01 Article PeerReviewed Hassan, M.F. and Rahman, W.N. and Akagi, T. and Sulaiman, N.S. and Bradley, D.A. and Noor, N.M. (2022) Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres. Radiation Physics and Chemistry, 202. art. no. 110521. pp. 1-8. ISSN 0969-806X; ESSN: 1879-0895 https://linkinghub.elsevier.com/retrieve/pii/S0969806X22005576 10.1016/j.radphyschem.2022.110521 |
| spellingShingle | Hassan, M.F. Rahman, W.N. Akagi, T. Sulaiman, N.S. Bradley, D.A. Noor, N.M. Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| title | Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| title_full | Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| title_fullStr | Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| title_full_unstemmed | Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| title_short | Thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| title_sort | thermoluminescence kinetic parameters of proton-irradiated germanium doped flat-shape optical fibres |
| url | http://psasir.upm.edu.my/id/eprint/110536/ http://psasir.upm.edu.my/id/eprint/110536/ http://psasir.upm.edu.my/id/eprint/110536/ |