Thermoluminescence property of LiMgF₃ erbium activated phosphor

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• 作者：I.C. Muñ ; oz^a ; E. Cruz-Zaragoza^b ; ^{ecruz@nucleares.unam.mx} ; A. Favalli^c ; C. Furetta^d
• 关键词：Perovskite ; Thermoluminescence ; Glow curves ; Dose&ndash ; response ; Deconvolution
• 刊名：Applied Radiation and Isotopes
• 出版年：2012
• 期刊代码：6_09698043
• 类别：ce
• 出版时间：May, 2012
• 卷：70
• 期：5
• 页码：893-896
• 文件大小：300 K

摘要

The perovskite-like LiMgF₃:ErF₃ pellets were obtained from the melt formed by LiF and MgF₂ mixed salts in the stoichiometric ratio. The perovskite material was doped with 1, 2 and 4 mol%of ErF₃ impurity. The pellets samples were ⁶⁰Co gamma irradiated and their thermoluminescence (TL) properties were analyzed, i.e., dose-response, fading at RT and under UV irradiation, TL signal reproducibility, and kinetic parameters. The intensity of the TL response against irradiation dose was increased remarkably by the high concentration of impurity, and a linear dose-response was observed in the range of 1-10 Gy. The fading observed at RT was about 10-30%after 24 h from irradiation. All samples were exposed from 1 to 200 Gy gamma dose range. The TL glow peaks were found around 367-376, 438-447, 509-521, and 594-611 K, when the doped samples were 1, 2 and 4 mol%of the erbium impurity concentration. The thermoluminescence kinetics parameters of the glow curves have been analyzed using the Computerized Glow Curve Deconvolution (CGCD) method.