On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA
The induced modifications in the optical properties of Makrofol® DE 1-1 solid state nuclear track detectors upon irradiation by UVB (302 nm) and UVA (365 nm) were characterized and compared. Makrofol® DE 1-1 detectors were irradiated separately for different durations with UVB (302 nm) and UVA (365 ...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-01-01
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| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379716306325 |
| _version_ | 1811274498633105408 |
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| author | A. Al-Amri M. El Ghazaly M.S. Abdel-Aal |
| author_facet | A. Al-Amri M. El Ghazaly M.S. Abdel-Aal |
| author_sort | A. Al-Amri |
| collection | DOAJ |
| description | The induced modifications in the optical properties of Makrofol® DE 1-1 solid state nuclear track detectors upon irradiation by UVB (302 nm) and UVA (365 nm) were characterized and compared. Makrofol® DE 1-1 detectors were irradiated separately for different durations with UVB (302 nm) and UVA (365 nm). The measurements revealed insignificant changes were observed at all in UVA (365 nm)-irradiated Makrofol® DE 1-1, irrespective the irradiation time (dose). All UVB (302 nm)-irradiated Makrofol® DE 1-1 detectors show a substantial red shift in UV–Vis spectra and a continuous increase in absorbance as the exposure time (Dose) to UVB increases. UVC-irradiated Makrofol® DE 1-1 exhibits absorption bands at 315 ± 5 nm in UV–visible spectra. The absorption increases exponential with the increasing the UVB irradiation time gets saturated started from 75 h to 400 h. In the visible light range no significant changes were observed in Makrofol® DE 1-1 detector irrespective the exposure time to UVB of 302 nm. It is found that the direct band gap is higher than indirect band gap and both decrease with the increase in the irradiation time of UVB of 302 nm. The obtained results of the Urbach energy and carbon atoms per cluster indicate that both increase with the increase in the irradiation time to UVB (302 nm). The induced modification in the optical properties of Makrofol® DE 1-1 can be used in UVB dosimetry, meanwhile it is not applicable for UVA of 365 nm. |
| first_indexed | 2024-04-12T23:20:13Z |
| format | Article |
| id | doaj.art-2352046c61dd4035aeba9ae09f727c7d |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-12T23:20:13Z |
| publishDate | 2017-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-2352046c61dd4035aeba9ae09f727c7d2022-12-22T03:12:32ZengElsevierResults in Physics2211-37972017-01-01713611366On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVAA. Al-Amri0M. El Ghazaly1M.S. Abdel-Aal2Department of Physics, Faculty of Science, Taif University, P.O. Box 888, Taif, Saudi Arabia; Department of Physics, Faculty of Science in Al Namas, Bisha University, Saudi Arabia; Corresponding author at: Department of Physics, Faculty of Science, Taif University, P.O. Box 888, Taif, Saudi Arabia.Department of Physics, Faculty of Science, Zagazig University, PO 44519, Zagazig, Egypt; Department of Physiology, Faculty of Medicine, Taif University, P.O. Box 888, Taif, Saudi ArabiaDepartment of Physics, Faculty of Science, Taif University, P.O. Box 888, Taif, Saudi Arabia; Department Spectroscopy, National Research Centre, 12311, Dokki, Cairo, EgyptThe induced modifications in the optical properties of Makrofol® DE 1-1 solid state nuclear track detectors upon irradiation by UVB (302 nm) and UVA (365 nm) were characterized and compared. Makrofol® DE 1-1 detectors were irradiated separately for different durations with UVB (302 nm) and UVA (365 nm). The measurements revealed insignificant changes were observed at all in UVA (365 nm)-irradiated Makrofol® DE 1-1, irrespective the irradiation time (dose). All UVB (302 nm)-irradiated Makrofol® DE 1-1 detectors show a substantial red shift in UV–Vis spectra and a continuous increase in absorbance as the exposure time (Dose) to UVB increases. UVC-irradiated Makrofol® DE 1-1 exhibits absorption bands at 315 ± 5 nm in UV–visible spectra. The absorption increases exponential with the increasing the UVB irradiation time gets saturated started from 75 h to 400 h. In the visible light range no significant changes were observed in Makrofol® DE 1-1 detector irrespective the exposure time to UVB of 302 nm. It is found that the direct band gap is higher than indirect band gap and both decrease with the increase in the irradiation time of UVB of 302 nm. The obtained results of the Urbach energy and carbon atoms per cluster indicate that both increase with the increase in the irradiation time to UVB (302 nm). The induced modification in the optical properties of Makrofol® DE 1-1 can be used in UVB dosimetry, meanwhile it is not applicable for UVA of 365 nm.http://www.sciencedirect.com/science/article/pii/S2211379716306325 |
| spellingShingle | A. Al-Amri M. El Ghazaly M.S. Abdel-Aal On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA Results in Physics |
| title | On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA |
| title_full | On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA |
| title_fullStr | On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA |
| title_full_unstemmed | On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA |
| title_short | On induced-modifications in optical properties of Makrofol® DE 1-1 SSNTD by UVB and UVA |
| title_sort | on induced modifications in optical properties of makrofol r de 1 1 ssntd by uvb and uva |
| url | http://www.sciencedirect.com/science/article/pii/S2211379716306325 |
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