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首页> 外文期刊>Optical Materials >Thermoluminescence dosimetric characteristics on cubic fluoroperovskite single crystal (KMgF3:Eu2+, Ce3+)
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Thermoluminescence dosimetric characteristics on cubic fluoroperovskite single crystal (KMgF3:Eu2+, Ce3+)

机译：立方氟钙钛矿单晶（KMgF3：Eu2 +，Ce3 +）的热发光剂量特性

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This paper describes investigation of thermoluminescence radiation dosimetry characteristics of Eu2+ doped Potassium Magnesium Fluoride (KMgF3) single crystal co-doped with Ce3+ ions. The perovskite-like KMgF3 polycrystalline compounds were synthesized by standard solid state reaction technique. Phase purity of the synthesized compounds was analyzed by powder X-ray diffraction technique. Single crystals of KMgF3 have been grown from melt by using a vertical Bridgman-Stockbarger method. Thermoluminescence (TL) characteristics of KMgF3 samples doped with Eu2+ and Ce3+ have been studied after beta-ray irradiation at room temperature. Order of kinetics (b), activation energy (E), and frequency factor (s) were determined by Chen's method and variable heating rate method. Results show that the TL glow peak of the KMgF3 samples obeys second-order kinetics. Analysis of the main dosimetric peak by using the methods mentioned above revealed that activation energy (E) is about 1.2 eV and the frequency factor (s) is in the range 10(10)-10(11) s(-1). The TL glow curve structure of the sample remained stable for higher doses of Sr-90/Y-90 beta source and it shows linearity up to 180 Gy. The time dependent fading behavior of the TL characteristics has also been investigated and is found to be quite stable over long time duration. The characteristic Eu2+ emissions are observed in the TL emission spectra. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文介绍了掺有Ce3 +离子的Eu2 +掺杂的氟化钾镁（KMgF3）单晶的热致发光辐射剂量学特性。通过标准的固态反应技术合成了钙钛矿状的KMgF3多晶化合物。通过粉末X射线衍射技术分析合成化合物的相纯度。通过使用垂直Bridgman-Stockbarger方法从熔体中生长出KMgF3单晶。在室温下进行β射线辐照后，已经研究了掺有Eu2 +和Ce3 +的KMgF3样品的热致发光（TL）特性。动力学的顺序（b），活化能（E）和频率因子（s）通过Chen方法和可变加热速率方法确定。结果表明，KMgF3样品的TL辉光峰服从二级动力学。通过使用上述方法分析主要剂量峰，发现活化能（E）约为1.2 eV，频率因数（s）在10（10）-10（11）s（-1）范围内。样品的TL辉光曲线结构对于更高剂量的Sr-90 / Y-90 beta离子源保持稳定，并且显示高达180 Gy的线性。还研究了TL特性随时间变化的衰落行为，发现其在长时间内相当稳定。在TL发射光谱中观察到特征Eu2 +发射。 （C）2015 Elsevier B.V.保留所有权利。

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