ABSTRACT In the present article, polycrystalline low Z (Zeff = 8.19) LiAlO2:Dy/Eu phosphor prepared by simple wet chemical method. Thermoluminescence and some of the dosimetric characteristics of Dy/Eu activated LiAlO2 were reported. Samples in powder form were exposed to γ-ray irradiation with 137 Cs source for both LiAlO2:Dy and LiAlO2:Eu phosphors were studied for the first time. In case of LiAlO2:Dy phosphor shows one peak at 287°C and small hump at 335°C. However; LiAlO2:Eu phosphor shows glow peak at 272°C with a shoulder peak around 329°C. The TL sensitivity in both the cases were compared with CaSO4:Dy phosphor.LiAlO2:Dy sample have shown 1.23 times less sensitive than CaSO4:Dy and for LiAlO2:Eu is 5.6 times less sensitive than CaSO4:Dy.The TL response in the 0.001-0.043Gy dose range increased linearly with increase in radiation dose for both the samples. Fading study has been also done for both the samples. In addition to this trap parameters of LiAlO2:Dy/Eu were calculated by using computerized glow curve deconvolution and Chen's peak shape method.

中文翻译：

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低 z LiAlO2:Dy/Eu 荧光粉的热释光和动力学研究

摘要 在本文中，多晶低 Z (Zeff = 8.19) LiAlO2:Dy/Eu 荧光粉通过简单的湿化学方法制备。报道了 Dy/Eu 活化的 LiAlO2 的热释光和一些剂量学特性。对于 LiAlO2:Dy 和 LiAlO2:Eu 磷光体，粉末形式的样品暴露于 137 Cs 源的 γ 射线辐照。在 LiAlO2:Dy 荧光粉的情况下，在 287°C 处显示一个峰，在 335°C 处显示一个小峰。然而; LiAlO2:Eu 荧光粉在 272°C 显示辉光峰，肩峰在 329°C 左右。两种情况下的 TL 灵敏度都与 CaSO4:Dy 磷光体进行了比较。LiAlO2:Dy 样品的灵敏度比 CaSO4:Dy 低 1.23 倍，而 LiAlO2:Eu 的灵敏度比 CaSO4:Dy 低 5.6 倍。0.001 中的 TL 响应-0。043Gy 剂量范围随着两个样品的辐射剂量的增加而线性增加。还对两个样品进行了褪色研究。除此之外，LiAlO2:Dy/Eu 的陷阱参数是通过使用计算机辉光曲线解卷积和 Chen 的峰形方法计算的。