基于纳米金簇荧光特性的高灵敏度、宽剂量测定范围的硫酸亚铁剂量计

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

Radiation Measurements Pub Date : 2024-09-23 DOI:10.1016/j.radmeas.2024.107304

Yu Chen, Shuquan Chang, Xiaodan Hu, Xiaohong Zhang, Haiqian Zhang

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引用次数: 0

摘要

随着核技术的广泛应用，辐射剂量的测量非常重要。硫酸亚铁剂量计是常见的化学剂量计，但其检测限高、剂量测定范围窄，限制了其在某些领域的应用。在这项工作中，我们利用组氨酸封端的金纳米团簇（AuNCs）的荧光特性，为硫酸亚铁剂量计引入了一种新的剂量测定方法。硫酸亚铁剂量计中的 Fe2+ 离子在辐照过程中被氧化成 Fe3+ 离子。Fe3+ 离子的存在导致 AuNCs 的荧光淬灭，从而建立了剂量计荧光强度与辐照剂量之间的相关性。荧光剂量计的最低检测限为 2 Gy。此外，剂量计的剂量响应在 2-400 Gy 的剂量范围内显示出良好的线性。荧光剂量计的剂量灵敏度比紫外可见光谱法高 17.9%。结果表明，利用 AuNCs 的荧光特性进行剂量测定的方法大大提高了剂量计的检测灵敏度和检测限。我们的工作为硫酸亚铁剂量计提供了一种新的剂量测定方法，可用于更广泛的辐照场合。

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High-sensitivity ferrous sulfate dosimeters with wide dosimetry range based on fluorescence properties of gold nanoclusters

With the widespread application of nuclear technologies, radiation dose measurement is important. Ferrous sulfate dosimeters are common chemical dosimeters, but their high detection limit and narrow dosimetry range limit their application in some fields. In this work, we introduce a novel dosimetry approach for ferrous sulfate dosimeters utilizing the fluorescence properties of gold nanoclusters (AuNCs) capped with histidine. The Fe²⁺ ions in the ferrous sulfate dosimeter are oxidized to Fe³⁺ ions during irradiation. The presence of Fe³⁺ ions results in the fluorescence quenching of AuNCs, establishing a correlation between the fluorescence intensity of the dosimeter and irradiation doses. The lowest detection limit of the fluorescence dosimeter was found to be 2 Gy. Moreover, the dose response of the dosimeter showed good linearity within the dose range of 2–400 Gy. The dosimetric sensitivity of the fluorescence dosimeter was 17.9% higher than that of ultraviolet–visible spectroscopy. The results indicate that the dosimetry method utilizing the fluorescence properties of AuNCs significantly improves the detection sensitivity and detection limit of the dosimeter. Our work provides a new dosimetry method for ferrous sulfate dosimeters that can be used in a wider range of irradiation situations.

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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.