Novel approach for emergency dosimetry: Investigations of screen protectors for smartphones by EPR spectroscopy

IF 1.6 3区 物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY Radiation Measurements Pub Date : 2024-06-25 DOI:10.1016/j.radmeas.2024.107218
M. Mobasher , N. Ollier , B. Gratuze , F. Trompier
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Abstract

Screen protectors for smartphone are investigated in attempts for emergency dosimetry as for example in case of malicious attacks with radioactive sources or accidental overexposure. Electron Paramagnetic Resonance (EPR) measurements were carried out on six different types of screen protectors (SPs). The inter and intra batch variability of the EPR signals characteristics (sensitivity, stability, signal shape) were studied. Contrary to touch screen (De Angelis et al., 2015; Juniewicz et al., 2020), UVB exposure for SP is not a limiting confounding factor. All samples under irradiation exhibit same EPR signals. The nature of the radio-induced point defects was identified (HC1 and HC2) as well as their evolution according to dose. The linear dose response was studied in the 0–5 Gy dose range with a detection limit estimated of 750 mGy with a field deployable benchtop EPR spectrometer. Large variability of the dose response prevents presently from using universal calibration curve. Therefore, further work is needed to consider possible application for triage in the case of large-scale accidents scenarios.

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紧急剂量测定的新方法:通过 EPR 光谱法调查智能手机屏幕保护装置
对智能手机的屏幕保护装置进行了研究,以尝试进行紧急剂量测定,例如在受到放射源恶意攻击或意外过度照射的情况下。对六种不同类型的屏幕保护器(SP)进行了电子顺磁共振(EPR)测量。研究了 EPR 信号特征(灵敏度、稳定性、信号形状)的批间和批内变异性。与触摸屏相反(De Angelis 等人,2015 年;Juniewicz 等人,2020 年),SP 的 UVB 暴露并不是限制性混杂因素。所有接受照射的样品都表现出相同的 EPR 信号。确定了辐射诱导的点缺陷(HC1 和 HC2)的性质及其随剂量的变化情况。在 0-5 Gy 的剂量范围内研究了线性剂量反应,使用可现场部署的台式 EPR 光谱仪估计检测极限为 750 mGy。由于剂量反应的变异性较大,目前无法使用通用的校准曲线。因此,需要进一步开展工作,考虑在大规模事故情况下进行分流的可能性。
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来源期刊
Radiation Measurements
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.
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