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Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation

This study concerns on the thermoluminescence properties of Al2O3:C, Mg exposed to cobalt-60 gamma rays. The thermoluminescence properties investigated were thermoluminescence glow curve, linearity, sensitivity, fading, reproducibility, minimum detactable dose, energy response and thermoluminescence...

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Main Author: Saharin, Nurul Syazlin
Format: Thesis
Language:English
Published: 2015
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/53678/25/NurulSyazlinSaharinMFS2015.pdf
http://eprints.utm.my/id/eprint/53678/
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spelling my.utm.536782020-09-01T03:05:29Z http://eprints.utm.my/id/eprint/53678/ Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation Saharin, Nurul Syazlin QC Physics This study concerns on the thermoluminescence properties of Al2O3:C, Mg exposed to cobalt-60 gamma rays. The thermoluminescence properties investigated were thermoluminescence glow curve, linearity, sensitivity, fading, reproducibility, minimum detactable dose, energy response and thermoluminescence parameters. The samples were supplied by Testbourne Ltd, England in the form of sputtering target and the samples were crushed into powder form with grain size of 75 µm to 200 µm. The crystalline phase of the samples was identified using X-ray diffraction analysis. The results indicated that the powder samples are in polycrystalline state. Thermoluminescence properties were investigated by irradiating the samples to cobalt-60 gamma ray with doses from 5 Gy to 70 Gy. The glow curves were analyzed to determine various thermoluminescence properties of the samples. The results clearly show that Al2O3:C (0.2%), Mg (0.2%) has better thermoluminescence properties in terms of sensitivity, linearity, reproducibility and fading compared to other samples. Zeff of the samples were calculated as 10.83±0.01 and the results are close to Zeff of bone. The total mass absorption coefficients of Al2O3:C (0.2%) and Al2O3:C (0.2%), Mg (0.2%) were calculated using WinXCom software in order to calculate the photon energy response of the samples. By using the trumpet graph, the values of R (Dmeasured / Ddelivered) for Al2O3:C (0.2%), Mg (0.2%) sample were within the acceptable limit recommended by ICRP. The average activation energy of Al2O3:C (0.2%) and Al2O3:C (0.2%), Mg (0.2%) were calculated as 2.03 eV and 1.49 eV, respectively. The frequency factor calculated from TL glow curves of Al2O3:C (0.2%) and Al2O3:C (0.2%), Mg(0.2%) were 2.61x10(25)s(-1) and 7.51x10(17)s(-1), respectively. 2015-01 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/53678/25/NurulSyazlinSaharinMFS2015.pdf Saharin, Nurul Syazlin (2015) Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85130
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QC Physics
spellingShingle QC Physics
Saharin, Nurul Syazlin
Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation
description This study concerns on the thermoluminescence properties of Al2O3:C, Mg exposed to cobalt-60 gamma rays. The thermoluminescence properties investigated were thermoluminescence glow curve, linearity, sensitivity, fading, reproducibility, minimum detactable dose, energy response and thermoluminescence parameters. The samples were supplied by Testbourne Ltd, England in the form of sputtering target and the samples were crushed into powder form with grain size of 75 µm to 200 µm. The crystalline phase of the samples was identified using X-ray diffraction analysis. The results indicated that the powder samples are in polycrystalline state. Thermoluminescence properties were investigated by irradiating the samples to cobalt-60 gamma ray with doses from 5 Gy to 70 Gy. The glow curves were analyzed to determine various thermoluminescence properties of the samples. The results clearly show that Al2O3:C (0.2%), Mg (0.2%) has better thermoluminescence properties in terms of sensitivity, linearity, reproducibility and fading compared to other samples. Zeff of the samples were calculated as 10.83±0.01 and the results are close to Zeff of bone. The total mass absorption coefficients of Al2O3:C (0.2%) and Al2O3:C (0.2%), Mg (0.2%) were calculated using WinXCom software in order to calculate the photon energy response of the samples. By using the trumpet graph, the values of R (Dmeasured / Ddelivered) for Al2O3:C (0.2%), Mg (0.2%) sample were within the acceptable limit recommended by ICRP. The average activation energy of Al2O3:C (0.2%) and Al2O3:C (0.2%), Mg (0.2%) were calculated as 2.03 eV and 1.49 eV, respectively. The frequency factor calculated from TL glow curves of Al2O3:C (0.2%) and Al2O3:C (0.2%), Mg(0.2%) were 2.61x10(25)s(-1) and 7.51x10(17)s(-1), respectively.
format Thesis
author Saharin, Nurul Syazlin
author_facet Saharin, Nurul Syazlin
author_sort Saharin, Nurul Syazlin
title Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation
title_short Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation
title_full Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation
title_fullStr Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation
title_full_unstemmed Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation
title_sort dosimetric properties of al2o3:c, mg exposed to external cobalt-60 gamma irradiation
publishDate 2015
url http://eprints.utm.my/id/eprint/53678/25/NurulSyazlinSaharinMFS2015.pdf
http://eprints.utm.my/id/eprint/53678/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85130
_version_ 1677781086246010880
score 13.211869

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