制备温度和浸泡时间对NaLi2PO4:Eu荧光粉OSL的影响

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2025-03-12 DOI:10.1016/j.radmeas.2025.107418

Mo Zhou , Kaiyong Tang , Li Fu , Siyuan Zhang , Haijun Fan , Yan Zeng

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引用次数: 0

摘要

NaLi2PO4:Eu 是一种光激发发光（OSL）荧光粉，具有良好的 OSL 稳定性，但 OSL 灵敏度较低。许多研究表明，荧光粉在制备过程中的改性会影响其 OSL 特性。本研究的重点是通过研究制备温度和浸泡时间对热致发光（TL）和 OSL 性能的影响来提高 NaLi2PO4:Eu OSL 的灵敏度。在不同制备温度和浸泡时间下合成的样品均呈现纯相。差示扫描量热法表明，材料在 850 ℃ 至 1000 ℃ 之间经历了一个内热过程，1000 ℃ 之后则经历了一个放热结晶过程。我们的研究发现，在材料合成过程中，TL 主峰和初始 OSL 计数受制备温度的影响，但 TL 和 OSL 的稳定性不受制备温度的影响。缩短浸泡时间可以提高这种材料的 OSL 稳定性。我们的测量结果表明，TL 和 OSL 信号可能来自不同的陷阱。在 1000 °C 下加热 2 小时的过程具有良好的 OSL 灵敏度和稳定性（衰减率为 3%）。它在 0.1-5 Gy 范围内具有线性剂量响应。此外，这种荧光粉的重复性也很好。

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Impact of preparing temperature and soaking time on OSL of NaLi2PO4:Eu phosphor

NaLi₂PO₄:Eu was an optically stimulated luminescence (OSL) phosphor with good OSL stability but low OSL sensitivity. Many studies have indicated that the OSL properties of phosphors can be affected by modifications during the preparation process. The main focus of this research is to improve the NaLi₂PO₄:Eu OSL sensitivity by investigating the effects of the preparing temperature and soaking time on thermoluminescence (TL) and OSL properties. The samples synthesized at different preparation temperature and soaking time all exhibit pure phases. Differential Scanning Calorimetry indicates that the material undergoes an endothermic process between 850 °C and 1000 °C, and after 1000 °C, the material experiences an exothermic crystallization process. Our research find that the TL main peak and the initial OSL count are influenced by the preparing temperature in the material synthesis process, however, the stability of TL and OSL is not affected by the preparing temperature. Shortening the soaking time can increase the OSL stability of this material. Our measurement results suggest that the TL and OSL signals may originate from different traps. The process of heating at 1000 °C for 2 h has good OSL sensitivity and stability (3 % of fading). It has a linear dose response in the range of 0.1–5 Gy. Furthermore, the repeatability of this phosphor is excellent.

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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.