| Thermoluminescence study of rare earth ion （Dy^3＋） doped LiF：Mg crystals grown by EFG technique |
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| 作者姓名： | Pooja Seth Shruti Aggarwal S M Rao |
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| 作者单位： | [1]University School of Basic and Applied Science, Guru Gobind Singh Indraprastha University, New Delhi 110078, India [2]Department of Physics, Punjabi University,Patiala 110078, India |
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| 基金项目： | Project supported by the Department of Science ＆ Technology Project （SR/NM/NAT-02-2007）We wish to thank A. C. Sharma and R. C. Verma for constant encouragement. Thanks are due to Dr. S.P Loachab for allowing and Ms. Shaila Bahl for helping in doing the TL measurements and irradiation at 1UAC. |
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| 摘 要： | This work describes investigation of radiation dosimetry characteristics of magnesium (Mg) doped lithium fluoride (LiF) crystals co-doped with different concentrations of dysprosium (Dy). These crystals were grown by edge defined film fed crystal growth (EFG) tech-nique. Thermoluminescence (TL) measurements were made on as grown (AG) and annealed (AN) crystals after they were irradiated with a gamma dose of 15 Gy. The influence and advantage of optimized Dy3+ concentration in enhancing the thermoluminescence (TL) properties of LiF:Mg samples were discussed. The normalized peak height of the annealed crystals was nearly 3 times that of the as grown crystals for the particular concentration samples irradiated with Co60 gamma source showed linearity up to 10 Gy. Thermoluminescence signal observed over a period of one month showed negligible fading. Thermoluminescence glow curve structure of optimized phosphor remained stable for higher doses of gamma rays of 103 Gy. Glow curve was analyzed using computer glow curve deconvolution (CGCD) method and trapping parame-ters were calculated.
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| 关 键 词： | thermoluminescence rare earth ions annealing edge defined film fed growth technique |
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