Thermoluminescence study of rare earth ion (Dy^(3+)) doped LiF:Mg crystals grown by EFG technique

作     者：Pooja Seth Shruti Aggarwal S M Rao 

作者机构：University School of Basic and Applied Science Guru Gobind Singh Indraprastha University Department of Physics Punjabi University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2012年第30卷第7期

页      面：641-646页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Project supported by the Department of Science & Technology Project (SR/NM/NAT-02-2007) 

主　　题：thermoluminescenea rare earth ions annealing edge defined film fed growth technique 

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 Dy^3＋ 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 Co6~ 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.