Thermoluminescence properties of <textbox>TiO₂textbox> nanopowder

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• 作者：J.C. Azorí ; n-Vega ; J. Azorí ; n-Nieto ; M. Garcí ; a-Hip&#xf3 ; lito ; T. Rivera-Montalvo
• 关键词：Thermoluminescence ; Metallic oxides ; Dosimetry
• 刊名：Radiation Measurements
• 出版年：2007
• 期刊代码：71_13504487
• 类别：ce
• 出版时间：April-May 2007
• 卷：42
• 期：4-5
• 页码：613-616
• 文件大小：314 K

摘要

Titanium oxide tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml9&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=ad32ecb0fd13989be095c9c6b65351a6" title="Click to view the MathML source">(TiO₂)-based ceramics have many desirable and potential applications. Their mechanical properties are strongly affected by composition and microstructure, and can thus be tailored. The optical properties of tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml10&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=ac319bc0422ac0d742b364fa832e4df6" title="Click to view the MathML source">TiO₂ are useful, being colorless, transparent, and possessing a high refractive index. These properties and the ability to tailor the structure make tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml11&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=95ac50d0d3836365e23635a5cacffa94" title="Click to view the MathML source">TiO₂-based ceramics suitable for a wide range of applications. Interest in titanium oxide-based ceramics has increased considerably in recent years as possible thermoluminescence (TL) dosimeters which could be used in a wide variety of research activities and applications of ionizing radiation dosimetry. The aim of this work is to investigate some dosimetric properties of manganese doped titanium oxide tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml12&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=f41790336f8b4e383f6299d714effb5d" title="Click to view the MathML source">(TiO₂:Mn) nanopowder concerning the TL phenomenon related to its structural, morphological, and luminescent characteristics. Powder of tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml13&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=f69f576c6aa37d6e508a512e99323b72" title="Click to view the MathML source">TiO₂:Mn was prepared using a co-precipitation method from titanium oxysulfate–sulfuric acid complex tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml14&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=fea30cc9805ff2bed8242feae327c5f5" title="Click to view the MathML source">(TiOSO₄×H₂SO₄×H₂O) and tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml15&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=95dc9f63712816b2a2e5d82ddab0a0a8" title="Click to view the MathML source">manganese(II)chloride·6H₂O. Formation of the compound was confirmed by studying the X-ray diffraction patterns. Diffraction patterns obtained suggested a mixture of anatase and rutile structure of the tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml16&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=208f9616794e1ceb7771c42d7c48d0cf" title="Click to view the MathML source">TiO₂ powder analyzed. Assuming the particles are stress-free, the size was estimated from a single diffraction peak using Scherrer's equation. Powder with the average nanopolycrystalline sizes from thURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml17&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=98f139f0586db1d70ce09d96f9c0c1b1">ttp://www.sciencedirect.com/cache/MiamiImageURL/B6TVS-4N3P0BB-8-M/0?wchp=dGLbVlb-zSkWA" alt="Click to view the MathML source" align="absbottom" border="0" height=13 width=42> up to about thURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml18&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=631e3abd7f5df15fa90da133b702336e">ttp://www.sciencedirect.com/cache/MiamiImageURL/B6TVS-4N3P0BB-8-N/0?wchp=dGLbVlb-zSkWA" alt="Click to view the MathML source" align="absbottom" border="0" height=13 width=43> was obtained. The glow curve of tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml19&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=a762f0c7bde89d63e7eecfd390a16e48" title="Click to view the MathML source">TiO₂:Mn nanopowder exposed to gamma radiation exhibited one main peak centered at thURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml20&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=0602d07d14f931e8c95b38cf6311c8e2">ttp://www.sciencedirect.com/cache/MiamiImageURL/B6TVS-4N3P0BB-8-S/0?wchp=dGLbVlb-zSkWA" alt="Click to view the MathML source" align="absbottom" border="0" height=13 width=48> and a lower intensity peak at about thURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml21&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=8dd50e08ba217efeaadef5c1551594fe">ttp://www.sciencedirect.com/cache/MiamiImageURL/B6TVS-4N3P0BB-8-T/0?wchp=dGLbVlb-zSkWA" alt="Click to view the MathML source" align="absbottom" border="0" height=14 width=48>. The intensity of the main peak increases as the dose increases. TL glow curve intensity of tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml22&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=10860771fb8b826e8c797cde75057bde" title="Click to view the MathML source">TiO₂:Mn powder submitted to thURL&_method=retrieve&_udi=B6TVS-4N3P0BB-8&_mathId=mml23&_user=10&_cdi=5542&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=3a2b96b0227d929974062d7c5571e3a9">ttp://www.sciencedirect.com/cache/MiamiImageURL/B6TVS-4N3P0BB-8-W/0?wchp=dGLbVlb-zSkWA" alt="Click to view the MathML source" align="absbottom" border="0" height=13 width=55> was found to be more intense than that of the amorphous material, with the intensity increasing with the increase of crystallization temperature.