Thermoluminescence properties of β-ray irradiated LuAGG:Ce nanophosphors prepared by sol-gel method for potential applications in dosimetry

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY Radiation Measurements Pub Date : 2024-09-10 DOI:10.1016/j.radmeas.2024.107296

S. Saadi , D.E. Kdib , A. Boukerika , R. Berreksi , A. Bentabet , S. Mahtout , Z. L Mokrani

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Abstract

In this paper, Lu_2.97Al_5–xGa_xO₁₂:Ce_0.03 (x = 0, 1, 2, 3) nanophosphors were synthesized using sol-gel method and calcined at 1100 °C for 3 h. The effect of Ga content on the structural, photoluminescence (PL), and notably thermoluminescence (TL) glow curve, dose response, repeatability and fading properties were investigated. X-ray diffraction (XRD) results indicated that all synthesized samples were crystallized in a pure garnet phase. The PL emission spectra exhibited a broad emission band corresponding to the 5 d → 4f (²F_5/2, ²F_7/2) transition of Ce³⁺ ions in the garnet lattice. Furthermore, a significant decrease in emission intensity was observed upon increasing Ga content. The TL characteristics of nanopowders irradiated with β-rays revealed a significant effect of Ga content on the peak position, shape and intensities of TL Glow curves, which can be explained by the reduction of the energy gap and the distribution of trap levels. The dose response linearity in the range of 0.125–100 Gy was examined for different Ga content, revealing a good linear behavior for x = 0 and 1 Ga. Additionally, samples prepared with x = 0, 1, and 2 Ga exhibited a high level of repeatability across a batch of 10 samples. Also, fading studies were performed for 128 h and revealed strong fading in samples synthesized with x = 0 and 1 Ga. These results suggest potential applications of Lu₃Al₅O₁₂:Ce and Lu₃Al₄Ga₁O₁₂:Ce in ionizing radiation dosimetry.

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溶胶-凝胶法制备的 β 射线辐照 LuAGG:Ce 纳米磷的热致发光特性在剂量测定中的潜在应用

本文采用溶胶-凝胶法合成了 Lu2.97Al5-xGaxO12:Ce0.03（x = 0、1、2、3）纳米磷酸盐，并在 1100 °C 煅烧 3 h。研究了 Ga 含量对结构、光致发光 (PL) 和显著热致发光 (TL) 辉光曲线、剂量响应、重复性和衰减特性的影响。X 射线衍射 (XRD) 结果表明，所有合成样品均为纯石榴石相结晶。聚光发射光谱显示出一个宽发射带，对应于石榴石晶格中 Ce3+ 离子的 5 d → 4f (2F5/2, 2F7/2)转变。此外，随着镓含量的增加，发射强度也明显下降。用 β 射线辐照纳米粉体的 TL 特性表明，镓含量对 TL 辉光曲线的峰值位置、形状和强度有显著影响，这可以用能隙的减小和陷阱水平的分布来解释。对不同镓含量在 0.125-100 Gy 范围内的剂量响应线性进行了研究，结果表明 x = 0 和 1 Ga 具有良好的线性行为。此外，用 x = 0、1 和 2 Ga 制备的样品在一批 10 个样品中表现出较高的重复性。此外，还对 x = 0 和 1 Ga 合成的样品进行了长达 128 小时的衰减研究，结果表明这些样品具有很强的衰减性。这些结果表明了 Lu3Al5O12:Ce 和 Lu3Al4Ga1O12:Ce 在电离辐射剂量测定中的潜在应用。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.