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Document Details
Document Type
:
Article In Journal
Document Title
:
Nanoparticles of BaSO4:Eu for heavy-dose measurements
Nanoparticles of BaSO4:Eu for heavy-dose measurements
Subject
:
Nanotechnology
Document Language
:
English
Abstract
:
Nanoparticles of BaSO4:Eu with grain size in the range 30-50 nm have been prepared by the chemical co-precipitation method and characterized by UV-visible spectrometry and X-ray diffraction (XRD). Shape and size of the prepared nanomaterials were observed by a scanning electron microscope (SEM). The optical energy band gaps of the micro- and nanocrystalline BaSO4:Eu were determined and are found to be 3.39±0.0136 and 3.48±0.0139 eV, respectively. The thermoluminescence (TL) glow curve of BaSO4:Eu nanoparticles has been studied and compared with that of the corresponding microcrystalline powder. It has been observed that the TL glow peak at 497 K, seen prominently in the microcrystalline sample, appeared as a small peak in nanocrystalline powder, while that observed as a shoulder in the former at 462 K dominates in the latter. The observed TL sensitivity of the prepared nanocrystalline powder is less than that of the microcrystalline sample at low doses, while it is more at higher doses. This nanophosphor exhibits a linear/sublinear TL response to γ-radiation over a very wide range of exposures (0.1 Gy to 7 KGy), which is much wider compared to that of the microcrystalline counterpart (0.1-10 Gy). This response over a large span of exposures makes the nanostructure form of BaSO4:Eu useful for its application to estimate low as well as high exposures of γ-rays. © 2008 Elsevier B.V. All rights reserved.
ISSN
:
0022-2313
Journal Name
:
Journal of Luminescence
Volume
:
129
Issue Number
:
3
Publishing Year
:
2009 AH
2009 AD
Number Of Pages
:
5
Article Type
:
Article
Added Date
:
Wednesday, October 14, 2009
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
نعمان عبدالله صلاح
Numan Salah
Researcher
Doctorate
alnumany@yahoo.com
سامي بن سعيد حبيب
Sami S. Habib
Researcher
Doctorate
cnt@kau.edu.sa
ظهير خان
Khan, Z.H
Researcher
Doctorate
drkhanchem@yahoo.com
سالم محمود عبدالله محمد الحامدي
Salim Al-Hamedi
Researcher
Doctorate
salem1133@yahoo.com
Lochab, S.P
Lochab, S.P
Researcher
Doctorate
Files
File Name
Type
Description
23431.pdf
pdf
Abstract
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