Thermoluminescence and kinetic study of low z LiAlO2:Dy/Eu phosphors

IF 1.3 4区物理与天体物理 Q4 PHYSICS, CONDENSED MATTER Ferroelectrics Letters Section Pub Date : 2017-05-04 DOI:10.1080/07315171.2017.1256109

Monali R. Kadukara, P. W. Yawalkarb, S. P. Lochabc, S. J. Dhoblea, Sudhakar Reddyd, Deborah J. Taylor

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引用次数: 2

Abstract

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.

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低z LiAlO2:Dy/Eu荧光粉的热发光及动力学研究

本文采用简单湿化学法制备了低Z (Zeff = 8.19) LiAlO2:Dy/Eu多晶荧光粉。报道了Dy/Eu活化LiAlO2的热释光特性和一些剂量学特性。采用137cs源γ射线辐照，首次对粉末状的LiAlO2:Dy和LiAlO2:Eu荧光粉进行了研究。LiAlO2:Dy荧光粉在287℃时出现一个峰，在335℃时出现一个小峰。然而;LiAlO2:Eu荧光粉在272℃时出现发光峰，在329℃左右出现肩峰。将两种情况下的TL敏感性与CaSO4:Dy荧光体进行比较。LiAlO2:Dy样品的灵敏度比CaSO4:Dy低1.23倍，LiAlO2:Eu样品的灵敏度比CaSO4:Dy低5.6倍。两种样品在0.001 ~ 0.043 gy剂量范围内的TL响应随辐射剂量的增加呈线性增加。并对两种样品进行了褪色研究。此外，利用计算机辉光曲线反褶积和Chen峰形法计算了LiAlO2:Dy/Eu的捕集参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ferroelectrics Letters Section 物理-物理：凝聚态物理

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

4.8 months

期刊介绍： Ferroelectrics Letters is a separately published section of the international journal Ferroelectrics. Both sections publish theoretical, experimental and applied papers on ferroelectrics and related materials, including ferroelastics, ferroelectric ferromagnetics, electrooptics, piezoelectrics, pyroelectrics, nonlinear dielectrics, polymers and liquid crystals. Ferroelectrics Letters permits the rapid publication of important, quality, short original papers on the theory, synthesis, properties and applications of ferroelectrics and related materials.