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
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spelling	my-utm-ep.536782020-09-01T03:05:29Z Dosimetric properties of AL2O3:C, Mg exposed to external cobalt-60 gamma irradiation 2015-01 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 http://eprints.utm.my/id/eprint/53678/ http://eprints.utm.my/id/eprint/53678/25/NurulSyazlinSaharinMFS2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85130 masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
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
qualification_level	Master's degree
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
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2015
url	http://eprints.utm.my/id/eprint/53678/25/NurulSyazlinSaharinMFS2015.pdf
_version_	1747817610491199488

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

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