Measurement of photoelectron generation in a gold coated glass slide
In thin low-Z media irradiated by photon energies of several tens of keV, the presence of a high-Z additive can result in manifest locally modified secondary electron dose. Present study analyses the photoelectron dose enhancement resulting from nanometre thickness gold (atomic number Z = 78) coated...
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Elsevier
2021
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| Online Access: | http://eprints.sunway.edu.my/1588/ |
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| author | Almugren, K.S. Abdul Sani, S.F. Uguru, E.H. Amiera Narissa, N.H. Zakaria, R. Alkallas, F.H. Bradley, D.A. * |
| author_facet | Almugren, K.S. Abdul Sani, S.F. Uguru, E.H. Amiera Narissa, N.H. Zakaria, R. Alkallas, F.H. Bradley, D.A. * |
| author_sort | Almugren, K.S. |
| building | SU Institutional Repository |
| collection | Online Access |
| description | In thin low-Z media irradiated by photon energies of several tens of keV, the presence of a high-Z additive can result in manifest locally modified secondary electron dose. Present study analyses the photoelectron dose enhancement resulting from nanometre thickness gold (atomic number Z = 78) coated on commercial borosilicate (B2O3) glass microscope cover-slips. Two thicknesses of B2O3 cover-slip have been utilized, 0.13 ± 0.02 mm and 1.00 ± 0.01 mm, with single-sided Au coatings of 20, 40, 60, 80 and 100 nm. An additional uncoated glass slide has been kept as a comparator. The samples have been exposed to X-rays generated at kVp potentials, delivering a fixed dose of 2 Gy. Dose enhancement resulting from the 1.00 mm glass has been observed to be ~1.32 × that of the 0.13 mm thickness glass. The elemental composition of the samples has been obtained via Electron Dispersive X-ray (EDX), elemental content differences between the two thicknesses of glass leading to a difference in effective atomic number of less than 0.3%. The influence on photon yield of the gold coating and variations in elemental content has been modelled using Monte Carlo simulation, allowing comparison with the measured values of enhanced TL yield. |
| first_indexed | 2025-11-14T21:17:53Z |
| format | Article |
| id | sunway-1588 |
| institution | Sunway University |
| institution_category | Local University |
| last_indexed | 2025-11-14T21:17:53Z |
| publishDate | 2021 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | sunway-15882021-02-15T05:05:18Z http://eprints.sunway.edu.my/1588/ Measurement of photoelectron generation in a gold coated glass slide Almugren, K.S. Abdul Sani, S.F. Uguru, E.H. Amiera Narissa, N.H. Zakaria, R. Alkallas, F.H. Bradley, D.A. * R895-920 Medical Physics/Medical Radiology In thin low-Z media irradiated by photon energies of several tens of keV, the presence of a high-Z additive can result in manifest locally modified secondary electron dose. Present study analyses the photoelectron dose enhancement resulting from nanometre thickness gold (atomic number Z = 78) coated on commercial borosilicate (B2O3) glass microscope cover-slips. Two thicknesses of B2O3 cover-slip have been utilized, 0.13 ± 0.02 mm and 1.00 ± 0.01 mm, with single-sided Au coatings of 20, 40, 60, 80 and 100 nm. An additional uncoated glass slide has been kept as a comparator. The samples have been exposed to X-rays generated at kVp potentials, delivering a fixed dose of 2 Gy. Dose enhancement resulting from the 1.00 mm glass has been observed to be ~1.32 × that of the 0.13 mm thickness glass. The elemental composition of the samples has been obtained via Electron Dispersive X-ray (EDX), elemental content differences between the two thicknesses of glass leading to a difference in effective atomic number of less than 0.3%. The influence on photon yield of the gold coating and variations in elemental content has been modelled using Monte Carlo simulation, allowing comparison with the measured values of enhanced TL yield. Elsevier 2021-01 Article PeerReviewed Almugren, K.S. and Abdul Sani, S.F. and Uguru, E.H. and Amiera Narissa, N.H. and Zakaria, R. and Alkallas, F.H. and Bradley, D.A. * (2021) Measurement of photoelectron generation in a gold coated glass slide. Radiation Physics and Chemistry, 178. p. 108913. ISSN 0969-806X http://doi.org/10.1016/j.radphyschem.2020.108913 doi:10.1016/j.radphyschem.2020.108913 |
| spellingShingle | R895-920 Medical Physics/Medical Radiology Almugren, K.S. Abdul Sani, S.F. Uguru, E.H. Amiera Narissa, N.H. Zakaria, R. Alkallas, F.H. Bradley, D.A. * Measurement of photoelectron generation in a gold coated glass slide |
| title | Measurement of photoelectron generation in a gold coated glass slide |
| title_full | Measurement of photoelectron generation in a gold coated glass slide |
| title_fullStr | Measurement of photoelectron generation in a gold coated glass slide |
| title_full_unstemmed | Measurement of photoelectron generation in a gold coated glass slide |
| title_short | Measurement of photoelectron generation in a gold coated glass slide |
| title_sort | measurement of photoelectron generation in a gold coated glass slide |
| topic | R895-920 Medical Physics/Medical Radiology |
| url | http://eprints.sunway.edu.my/1588/ http://eprints.sunway.edu.my/1588/ http://eprints.sunway.edu.my/1588/ |