TL, OSL and PL studies in <textbox>Al₂O₃textbox>:Si,Ti phosphor

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• 作者：B.C. Bhatt ; P.S. Page ; N.S. Rawat ; B.S. Dhabekar ; D.R. Mishra ; M.S. Kulkarni
• 关键词：style="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml41&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=e09e4bd57cd1fb9abb8586803283018a" t
• 刊名：Radiation Measurements
• 出版年：2008
• 期刊代码：71_13504487
• 类别：ce
• 出版时间：February-June 2008
• 卷：43
• 期：2-6
• 页码：327-331
• 文件大小：409 K

摘要

Thermoluminescence (TL) and optically stimulated luminescence (OSL) characteristics of style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml28&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=e956b803780d53203d02ea3a72cccccc" title="Click to view the MathML source" alt="Click to view the MathML source">Al₂O₃:Si,Ti phosphor have been studied. Its TL and OSL sensitivity is 1/9th and 1/120th respectively, compared to that of style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml29&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=610080eb42ea1b193b0c6a1c7464576e" title="Click to view the MathML source" alt="Click to view the MathML source">Al₂O₃:C commercial phosphor. Its dose vs. OSL response is linear up to 5 Gy, beyond which it shows slight supralinearity up to a dose of . The main TL peak at about 276 °C shows maximum emission at about 405 nm. Deconvolution of continuous-wave OSL (CW-OSL) decay curve suggests three individual CW-OSL decay components corresponding to photoionization cross-sections of style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml31&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=04dd262020bf546c064d560bb380ae56" title="Click to view the MathML source" alt="Click to view the MathML source">1.2×10^-18, style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml32&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=af15562c33db9947d3ffdb7cba55ef4d" title="Click to view the MathML source" alt="Click to view the MathML source">2.7×10^-19, . For an absorbed dose of followed by annealing at 530 °C for 20 min and a test gamma dose of 1 Gy, the radiation-induced sensitization factor for the CW-OSL response was 2.1. This can be explained by filling of deep traps . The photoluminescence (PL) spectrum of style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml36&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=e2eda3bbcf78796378ad08f1c76cd21e" title="Click to view the MathML source" alt="Click to view the MathML source">Al₂O₃:Si,Ti shows emission at 410 nm for excitation at 240 nm. From PL measurements we could not detect any F and style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml37&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=58fbb1792ca32f329f1f69e59254fdc3" title="Click to view the MathML source" alt="Click to view the MathML source">F⁺ center emissions in the style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml38&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=ff6aa911b6fb22b44ae399e647496037" title="Click to view the MathML source" alt="Click to view the MathML source">Al₂O₃:Si,Ti phosphor which is prepared under highly oxidizing conditions. The emission around 410 nm matches the emission reported in the literature for style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml39&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=21bdb5b3e50ee26d41bef2dbd9ad107a" title="Click to view the MathML source" alt="Click to view the MathML source">Ti⁴⁺ ions in style="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4RGFN23-1&_mathId=mml40&_user=1067359&_cdi=5542&_rdoc=45&_acct=C000050221&_version=1&_userid=10&md5=154804e8ee8dedca7188c68853fc28e3" title="Click to view the MathML source" alt="Click to view the MathML source">Al₂O₃.