Thermoluminescence Studies of High Energy X-Rays Irradiated Dy3+ Doped Mg0.65Zn0.3Al2O4:0.05Dy Nanophosphor

IF 1.5 4区 材料科学 Q3 Chemistry
Pankaj Pathak, Manisha Singh, Pankaj Kumar Mishra, Ajay Mittal, Snehal Jani, Ranjeet Brajpuriya
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Abstract

The solution combustion synthesis method is employed to prepare Magnesium,  Zinc, Aluminate doped with dysprosium (Dy3+) using the general formula Mg(1-x-y) Zn(y)Al2O4:xDy (x = 0.05 and y = 0.3 mol%). From X-ray diffraction studies, the crystal structure belongs to a cubic close-packed spinel structure with space group Fd3ˉm and an average crystallite size is 26.18 nm. In the Fourier transform infrared spectra, the peaks at 683.69 cm−1, 503.12 cm−1 correspond to the AlO6 groups. The peak temperature (Tm) from the Thermoluminescent glow curve is recorded at 235°C, 237°C, and 235°C, at irradiation doses of 600 Gy, 800 Gy, and 1000 Gy, respectively. The kinetic parameters are evaluated from the thermoluminescent glow curve by calculating the activation energy (E), order of kinetics (b), and frequency factor (s−1). Nanophosphor Mg0.65Zn0.3Al2O4:0.05Dy shows sub linear dose relationship at doses 600–675 Gy and 925–1000 Gy. Further, at doses between 675 and 925 Gy, it shows a super linear relationship. The optimum activation energy (E) of 0.77–0.82 eV and negligible fading make it suitable for high radiation thermoluminescent dosimetry.

Abstract Image

Abstract Image

高能 X 射线辐照 Dy3+ 掺杂 Mg0.65Zn0.3Al2O4:0.05Dy 纳米磷的热致发光研究
采用溶液燃烧合成法制备了掺杂镝(Dy3+)的镁锌铝酸盐,通式为 Mg(1-x-y) Zn(y)Al2O4:xDy (x = 0.05 和 y = 0.3 mol%)。根据 X 射线衍射研究,其晶体结构属于立方紧密堆积尖晶石结构,空间群为 Fd3ˉm,平均结晶尺寸为 26.18 nm。在傅立叶变换红外光谱中,683.69 cm-1 和 503.12 cm-1 处的峰值与 AlO6 基团相对应。在 600 Gy、800 Gy 和 1000 Gy 的辐照剂量下,热释辉曲线的峰值温度(Tm)分别为 235°C、237°C 和 235°C。通过计算活化能(E)、动力学阶次(b)和频率因子(s-1),从热释光辉光曲线中评估了动力学参数。在剂量为 600-675 Gy 和 925-1000 Gy 时,纳米磷 Mg0.65Zn0.3Al2O4:0.05Dy 显示出亚线性剂量关系。此外,在剂量介于 675 和 925 Gy 之间时,它显示出超线性关系。0.77-0.82 eV 的最佳活化能(E)和可忽略的衰减使其适用于高辐射热发光剂量测定。
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来源期刊
CiteScore
2.50
自引率
6.70%
发文量
121
审稿时长
1.9 months
期刊介绍: The journal Crystal Research and Technology is a pure online Journal (since 2012). Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of -crystal growth techniques and phenomena (including bulk growth, thin films) -modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals) -industrial crystallisation -application of crystals in materials science, electronics, data storage, and optics -experimental, simulation and theoretical studies of the structural properties of crystals -crystallographic computing
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