UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage
The effects of the X-ray irradiation and chemical etching on the physical and optical properties of CR-39 plastic detectors were investigated for different doses of X-ray. CR-39 detectors were etched in the solution of the 3 M of NaOH after irradiation for revelations of the track. The tracks formed...
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| Format: | Article |
| Language: | English |
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Universiti Kebangsaan Malaysia
2014
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| Online Access: | http://journalarticle.ukm.my/7188/ http://journalarticle.ukm.my/7188/1/21_Nur_Sha%C3%94%C3%87%C3%96dah.pdf |
| _version_ | 1848811401695461376 |
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| author | Nur Sha'dah, Z. Iskandar, S.M. Azhar, A.R. Suhaimi, M.J. Nur Lina, R. Halimah, M.K. |
| author_facet | Nur Sha'dah, Z. Iskandar, S.M. Azhar, A.R. Suhaimi, M.J. Nur Lina, R. Halimah, M.K. |
| author_sort | Nur Sha'dah, Z. |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | The effects of the X-ray irradiation and chemical etching on the physical and optical properties of CR-39 plastic detectors were investigated for different doses of X-ray. CR-39 detectors were etched in the solution of the 3 M of NaOH after irradiation for revelations of the track. The tracks formed on CR-39 either by irradiated X-ray or due to the effect of environment. The changes in the thickness after exposed have significant decrease in 60 kVp and started to increase in the range of 70 kVp up to 100 kVp due to the formation of oxidation layer on surface by free radicals. The optical band gaps before etching and after etching were determined by using Ultraviolet-visible (UV-Vis) spectroscopy. The optical band gap is attributed to the indirect transition due to its amorphous nature which is significantly decline trend energy in increase of the energy fluence of radiation. The Urbach’s energy, is defined as the width of the tail localized states in the forbidden band gap which change increment trend as increase in dose delivered due to the distortion structure of the CR-39 in terms of the electron charges in valences electron hence attributes to the induced modification of angle bond between the neighboring atoms. |
| first_indexed | 2025-11-14T23:45:49Z |
| format | Article |
| id | oai:generic.eprints.org:7188 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T23:45:49Z |
| publishDate | 2014 |
| publisher | Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:71882016-12-14T06:43:20Z http://journalarticle.ukm.my/7188/ UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage Nur Sha'dah, Z. Iskandar, S.M. Azhar, A.R. Suhaimi, M.J. Nur Lina, R. Halimah, M.K. The effects of the X-ray irradiation and chemical etching on the physical and optical properties of CR-39 plastic detectors were investigated for different doses of X-ray. CR-39 detectors were etched in the solution of the 3 M of NaOH after irradiation for revelations of the track. The tracks formed on CR-39 either by irradiated X-ray or due to the effect of environment. The changes in the thickness after exposed have significant decrease in 60 kVp and started to increase in the range of 70 kVp up to 100 kVp due to the formation of oxidation layer on surface by free radicals. The optical band gaps before etching and after etching were determined by using Ultraviolet-visible (UV-Vis) spectroscopy. The optical band gap is attributed to the indirect transition due to its amorphous nature which is significantly decline trend energy in increase of the energy fluence of radiation. The Urbach’s energy, is defined as the width of the tail localized states in the forbidden band gap which change increment trend as increase in dose delivered due to the distortion structure of the CR-39 in terms of the electron charges in valences electron hence attributes to the induced modification of angle bond between the neighboring atoms. Universiti Kebangsaan Malaysia 2014-06 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/7188/1/21_Nur_Sha%C3%94%C3%87%C3%96dah.pdf Nur Sha'dah, Z. and Iskandar, S.M. and Azhar, A.R. and Suhaimi, M.J. and Nur Lina, R. and Halimah, M.K. (2014) UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage. Sains Malaysiana, 43 (6). pp. 953-958. ISSN 0126-6039 http://www.ukm.my/jsm/ |
| spellingShingle | Nur Sha'dah, Z. Iskandar, S.M. Azhar, A.R. Suhaimi, M.J. Nur Lina, R. Halimah, M.K. UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage |
| title | UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage |
| title_full | UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage |
| title_fullStr | UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage |
| title_full_unstemmed | UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage |
| title_short | UV-VIS spectral evaluation of CR-39 detector exposed with diagnostic dosage |
| title_sort | uv-vis spectral evaluation of cr-39 detector exposed with diagnostic dosage |
| url | http://journalarticle.ukm.my/7188/ http://journalarticle.ukm.my/7188/ http://journalarticle.ukm.my/7188/1/21_Nur_Sha%C3%94%C3%87%C3%96dah.pdf |