Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter

Borate glasses have been widely studied due to their features as glass formers and present a very useful material for radiation dosimetry applications. The fundamental properties of germanium doped calcium borate glass; (30 -x)CaO 70B2O3: xGeO2 ( x = 0.1, 0.2, 0.3, 0.4 and 0.5 mol%) prepared using m...

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Main Author:	Tengku Kamrul Bahri, Tengku Nurul Hidayah
Format:	Thesis
Language:	English
Published:	2014
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/48904/25/TengkuNurulHidayahMFS2014.pdf
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spelling	my-utm-ep.489042020-07-05T07:59:02Z Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter 2014-04 Tengku Kamrul Bahri, Tengku Nurul Hidayah QC Physics Borate glasses have been widely studied due to their features as glass formers and present a very useful material for radiation dosimetry applications. The fundamental properties of germanium doped calcium borate glass; (30 -x)CaO 70B2O3: xGeO2 ( x = 0.1, 0.2, 0.3, 0.4 and 0.5 mol%) prepared using melt-quenching method were investigated. The physical properties including the amorphous state, density and molar volume were measured. The structural analyses were carried out using infrared transmission spectra and optical properties were determined from ultraviolet-visible optical spectra. Weight fraction obtained from energy dispersive X-ray spectrometry analysis leads to the determination of the effective atomic number of the sample. The total mass attenuation coefficients at photon energies of 0.662 MeV and 1.25 MeV were also calculated by using WinXCom software. Thermoluminescence properties measurements were performed by irradiating the glasses with 60Co gamma ray, 6 MV and 10 MV photon beam with doses ranging from 0.5 Gy to 4.0 Gy. The amorphous phases of the glass samples were identified from this study. The effective atomic number of glass sample was found to be between 11.70 to 12.52 for GeO2 concentration of 0.1 to 0.5 mol%. The values are quite close to the effective atomic number of the bone, which is 14. The densities, , molar volumes, optical band gap and refractive index indicate that GeO2 acts differently on the glass structure over their compositions. The glow curves were analysed to determine various thermoluminescence characteristics of the glass samples. The glass sample with GeO2 concentration of 0.1 mol% has the best thermoluminescence characteristics such as linearity, sensitivity, fading and reproducibility. In conclusion, germanium doped calcium borate glass has potential to be considered as thermoluminescence dosimeter. 2014-04 Thesis http://eprints.utm.my/id/eprint/48904/ http://eprints.utm.my/id/eprint/48904/25/TengkuNurulHidayahMFS2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86747 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 Tengku Kamrul Bahri, Tengku Nurul Hidayah Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
description	Borate glasses have been widely studied due to their features as glass formers and present a very useful material for radiation dosimetry applications. The fundamental properties of germanium doped calcium borate glass; (30 -x)CaO 70B2O3: xGeO2 ( x = 0.1, 0.2, 0.3, 0.4 and 0.5 mol%) prepared using melt-quenching method were investigated. The physical properties including the amorphous state, density and molar volume were measured. The structural analyses were carried out using infrared transmission spectra and optical properties were determined from ultraviolet-visible optical spectra. Weight fraction obtained from energy dispersive X-ray spectrometry analysis leads to the determination of the effective atomic number of the sample. The total mass attenuation coefficients at photon energies of 0.662 MeV and 1.25 MeV were also calculated by using WinXCom software. Thermoluminescence properties measurements were performed by irradiating the glasses with 60Co gamma ray, 6 MV and 10 MV photon beam with doses ranging from 0.5 Gy to 4.0 Gy. The amorphous phases of the glass samples were identified from this study. The effective atomic number of glass sample was found to be between 11.70 to 12.52 for GeO2 concentration of 0.1 to 0.5 mol%. The values are quite close to the effective atomic number of the bone, which is 14. The densities, , molar volumes, optical band gap and refractive index indicate that GeO2 acts differently on the glass structure over their compositions. The glow curves were analysed to determine various thermoluminescence characteristics of the glass samples. The glass sample with GeO2 concentration of 0.1 mol% has the best thermoluminescence characteristics such as linearity, sensitivity, fading and reproducibility. In conclusion, germanium doped calcium borate glass has potential to be considered as thermoluminescence dosimeter.
format	Thesis
qualification_level	Master's degree
author	Tengku Kamrul Bahri, Tengku Nurul Hidayah
author_facet	Tengku Kamrul Bahri, Tengku Nurul Hidayah
author_sort	Tengku Kamrul Bahri, Tengku Nurul Hidayah
title	Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
title_short	Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
title_full	Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
title_fullStr	Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
title_full_unstemmed	Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
title_sort	dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2014
url	http://eprints.utm.my/id/eprint/48904/25/TengkuNurulHidayahMFS2014.pdf
_version_	1747817499929346048

Dosimetric properties of germanium doped calcium borate glass for use as photon dosimeter

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