Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics
Present investigations concern germanium (Ge) doped (2.3 and 6.0 mol%) silica preforms fabricated into cylindrical- and flat-shaped fibre radiation dosimeters. When subjected to 150-MeV proton beam irradiation, the fibres are observed to produce sensitive dose response. The fibres are fabricated...
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| Format: | Article |
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Universiti Malaysia Perlis
2019
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| author | Hassan, M. F. Rahman, W. N. W. A. Kadir, A. B. A. Isa, N. M. Tominaga, T. Geso, M. Akasaka, H. Bradley, D. A. Noor, N. M. |
| author_facet | Hassan, M. F. Rahman, W. N. W. A. Kadir, A. B. A. Isa, N. M. Tominaga, T. Geso, M. Akasaka, H. Bradley, D. A. Noor, N. M. |
| author_sort | Hassan, M. F. |
| collection | UPM |
| description | Present investigations concern germanium (Ge) doped (2.3 and 6.0 mol%) silica preforms
fabricated into cylindrical- and flat-shaped fibre radiation dosimeters. When subjected to
150-MeV proton beam irradiation, the fibres are observed to produce sensitive dose
response. The fibres are fabricated via a modified chemical vapour dopant deposition
technique and subsequent pulling process. Prior to irradiation, a thermal annealing
process was carried out to erase any pre-irradiation signals potentially existing in the
samples. For radiation dose in the range from 1 up to 10 Gy, these optical fibres exhibit an
excellent linear relationship, offering coefficients of determination (R²) better than 0.99,
suggesting reliable calibration and utilisation. The general structure of
thermoluminescence (TL) glow curve is presented as a broad peak, differing from that of
the phosphor-based TLD-100 dosimeter. The maximum in the TL glow curve peak
manifests at a temperature within the readout range 231- to 350 °C. The relatively high
glow-peak temperatures allow the fabricated Ge-doped optical fibres to be measured
between room- and high-temperature conditions. In terms of shape, the TL glow curve
remains unchanged at different irradiation dose within the investigated range of interest
(1 to 5 Gy). The TL properties studied herein provide an important advance in
understanding the TL mechanism in the fabricated Ge-doped silica fibres, shown to be
viable for use in proton beam dosimetry. |
| first_indexed | 2024-03-06T10:26:56Z |
| format | Article |
| id | upm.eprints-79972 |
| institution | Universiti Putra Malaysia |
| last_indexed | 2024-03-06T10:26:56Z |
| publishDate | 2019 |
| publisher | Universiti Malaysia Perlis |
| record_format | dspace |
| spelling | upm.eprints-799722023-04-13T06:33:24Z http://psasir.upm.edu.my/id/eprint/79972/ Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics Hassan, M. F. Rahman, W. N. W. A. Kadir, A. B. A. Isa, N. M. Tominaga, T. Geso, M. Akasaka, H. Bradley, D. A. Noor, N. M. Present investigations concern germanium (Ge) doped (2.3 and 6.0 mol%) silica preforms fabricated into cylindrical- and flat-shaped fibre radiation dosimeters. When subjected to 150-MeV proton beam irradiation, the fibres are observed to produce sensitive dose response. The fibres are fabricated via a modified chemical vapour dopant deposition technique and subsequent pulling process. Prior to irradiation, a thermal annealing process was carried out to erase any pre-irradiation signals potentially existing in the samples. For radiation dose in the range from 1 up to 10 Gy, these optical fibres exhibit an excellent linear relationship, offering coefficients of determination (R²) better than 0.99, suggesting reliable calibration and utilisation. The general structure of thermoluminescence (TL) glow curve is presented as a broad peak, differing from that of the phosphor-based TLD-100 dosimeter. The maximum in the TL glow curve peak manifests at a temperature within the readout range 231- to 350 °C. The relatively high glow-peak temperatures allow the fabricated Ge-doped optical fibres to be measured between room- and high-temperature conditions. In terms of shape, the TL glow curve remains unchanged at different irradiation dose within the investigated range of interest (1 to 5 Gy). The TL properties studied herein provide an important advance in understanding the TL mechanism in the fabricated Ge-doped silica fibres, shown to be viable for use in proton beam dosimetry. Universiti Malaysia Perlis 2019 Article PeerReviewed Hassan, M. F. and Rahman, W. N. W. A. and Kadir, A. B. A. and Isa, N. M. and Tominaga, T. and Geso, M. and Akasaka, H. and Bradley, D. A. and Noor, N. M. (2019) Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics. International Journal of Nanoelectronics and Materials, 11 (spec. BOND21). pp. 209-218. ISSN 1985-5761 https://ijneam.unimap.edu.my/index.php/vol-11-dec-2018-special-issue-bond21 |
| spellingShingle | Hassan, M. F. Rahman, W. N. W. A. Kadir, A. B. A. Isa, N. M. Tominaga, T. Geso, M. Akasaka, H. Bradley, D. A. Noor, N. M. Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics |
| title | Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics |
| title_full | Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics |
| title_fullStr | Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics |
| title_full_unstemmed | Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics |
| title_short | Ge-doped silica fibre proton beam measurements: thermoluminescence dose-response and glow curve characteristics |
| title_sort | ge doped silica fibre proton beam measurements thermoluminescence dose response and glow curve characteristics |
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