Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide

In this study, the structural, optical and thermoluminescence (TL) properties of lithium sodium borate (LNB) glass doped with Er3+ or Nd3+ ions were investigated. The glass dosimeters were prepared by using melt-quenching technique. The X – ray Diffraction (XRD) spectra had confirmed the amorphous n...

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Main Author:	Razak, Nashru Amira
Format:	Thesis
Language:	English
Published:	2016
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/81617/1/NashruAmiraRazakMFS2015.pdf
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spelling	my-utm-ep.816172019-09-10T01:50:04Z Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide 2016 Razak, Nashru Amira QC Physics In this study, the structural, optical and thermoluminescence (TL) properties of lithium sodium borate (LNB) glass doped with Er3+ or Nd3+ ions were investigated. The glass dosimeters were prepared by using melt-quenching technique. The X – ray Diffraction (XRD) spectra had confirmed the amorphous nature of the glass samples. The absorption spectra of Er3+ ion doped LNB (LNB:Er) and Nd3+ ion doped LNB (LNB:Nd) glasses revealed hypersensitive transitions at (4I15/2?2H11/2) and (4I9/2 ? 4G5/2 + 2G7/2), respectively. Emission spectra of LNB glasses doped Er3+ ions had shown three violet bands centered at 369 nm (4G11/2?4I15/2), 396 nm (2P3/2?4I13/2) and 423 nm (2H9/2?4I15/2) and a blue band at 477 nm (2P3/2?4I11/2). Meanwhile, LNB glasses doped with Nd3+ ions had exhibited three prominent peaks of photoluminescence spectra which are green, orange and red bands centered at 538 nm (4G7/2 ? 4I9/2), 603 nm [4G7/2 ? 4I11/2, 4G5/2 ? 4I9/2] and 675 nm [4G7/2 ? 4I13/2, 4G5/2 ? 4I11/2], respectively. The introduction of rare earth ions into the glass system had led to the formation of glow curve with prominent peaks at 180 and 220 °C for LNB:Er and LNB:Nd, respectively. The optimum TL intensity of the prepared glasses was determined at 0.3 mol % of Er2O3 and 0.5 mol % of Nd2O3. A good linearity of the TL response against dose was achieved between 0.5 to 4.0 Gy. The sensitivity of 0.3 mol % of Er2O3 glass dosimeter was two times higher than the sensitivity of 0.5 mol % of Nd2O3. The calculated values of the effective atomic number (Zeff) for both compositions were 7.55 which is close to that of the human soft tissue (Zeff = 7.42). These promising features had demonstrated the potential of the studied glasses to be used as radiation. 2016 Thesis http://eprints.utm.my/id/eprint/81617/ http://eprints.utm.my/id/eprint/81617/1/NashruAmiraRazakMFS2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:120239 masters Universiti Teknologi Malaysia Physics
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Razak, Nashru Amira Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
description	In this study, the structural, optical and thermoluminescence (TL) properties of lithium sodium borate (LNB) glass doped with Er3+ or Nd3+ ions were investigated. The glass dosimeters were prepared by using melt-quenching technique. The X – ray Diffraction (XRD) spectra had confirmed the amorphous nature of the glass samples. The absorption spectra of Er3+ ion doped LNB (LNB:Er) and Nd3+ ion doped LNB (LNB:Nd) glasses revealed hypersensitive transitions at (4I15/2?2H11/2) and (4I9/2 ? 4G5/2 + 2G7/2), respectively. Emission spectra of LNB glasses doped Er3+ ions had shown three violet bands centered at 369 nm (4G11/2?4I15/2), 396 nm (2P3/2?4I13/2) and 423 nm (2H9/2?4I15/2) and a blue band at 477 nm (2P3/2?4I11/2). Meanwhile, LNB glasses doped with Nd3+ ions had exhibited three prominent peaks of photoluminescence spectra which are green, orange and red bands centered at 538 nm (4G7/2 ? 4I9/2), 603 nm [4G7/2 ? 4I11/2, 4G5/2 ? 4I9/2] and 675 nm [4G7/2 ? 4I13/2, 4G5/2 ? 4I11/2], respectively. The introduction of rare earth ions into the glass system had led to the formation of glow curve with prominent peaks at 180 and 220 °C for LNB:Er and LNB:Nd, respectively. The optimum TL intensity of the prepared glasses was determined at 0.3 mol % of Er2O3 and 0.5 mol % of Nd2O3. A good linearity of the TL response against dose was achieved between 0.5 to 4.0 Gy. The sensitivity of 0.3 mol % of Er2O3 glass dosimeter was two times higher than the sensitivity of 0.5 mol % of Nd2O3. The calculated values of the effective atomic number (Zeff) for both compositions were 7.55 which is close to that of the human soft tissue (Zeff = 7.42). These promising features had demonstrated the potential of the studied glasses to be used as radiation.
format	Thesis
qualification_level	Master's degree
author	Razak, Nashru Amira
author_facet	Razak, Nashru Amira
author_sort	Razak, Nashru Amira
title	Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
title_short	Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
title_full	Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
title_fullStr	Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
title_full_unstemmed	Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
title_sort	structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide
granting_institution	Universiti Teknologi Malaysia
granting_department	Physics
publishDate	2016
url	http://eprints.utm.my/id/eprint/81617/1/NashruAmiraRazakMFS2015.pdf
_version_	1747818372276420608

Structural, optical and luminescence properties of lithium sodium borate glass doped with erbium of neodymium oxide

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