评估用于氯化钠颗粒辐射剂量评估的便携式 OSL/IRSL 阅读器--R/N 紧急情况下的现场个性化筛查

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

Radiation Measurements Pub Date : 2024-10-26 DOI:10.1016/j.radmeas.2024.107323

Maria Karampiperi, Christopher L. Rääf, Christian Bernhardsson

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引用次数: 0

摘要

家用盐氯化钠（NaCl）被认为是一种适用于回顾性和前瞻性光激发发光（OSL）辐射剂量测定的材料。本文研究了在辐射和/或核紧急情况下将氯化钠颗粒与现有的便携式读数器结合使用的可能性，并将其作为一种新型工具用于对受辐射人群的个人剂量进行现场筛查。根据 OSL 和红外激发发光（IRSL）方法对便携式读数器的性能进行了评估，并将评估结果与两台研究型读数器 Risø TL/OSL （DA-20 和 DA-15）进行了比较。研究发现，在所研究的吸收剂量范围（0.63-487 mGy）内，便携式阅读器需要使用五个颗粒才能获得与两台研究型阅读器使用一个颗粒相似的 OSL 信号幅度。在所研究的剂量范围内，三种阅读器的 OSL 结果显示出相似的最小可检测剂量 (MDD) 值和相似的 OSL 剂量响应曲线线性趋势。IRSL 结果显示，便携式阅读器的 IRSL 信号较低，导致 MDD 值高于固定式阅读器。使用 SUERC 便携式读取器对氯化钠进行 OSL 和 IRSL 测量时，MDD 分别可低至 2.3 和 47 μGy。此外，通过结合多次读出和时间延迟测试的先进方案，确认了对同一颗粒进行多次读取的可能性。如果结合使用 OSL 和 IRSL 测量，如果第一次测量的是 OSL，则必须调整刺激长度；如果第一次测量的是 IRSL，则 OSL 信号与 IRSL 刺激长度无关。

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Evaluation of a portable OSL/IRSL reader for radiation dose assessment of NaCl pellets – In situ individualised screening during R/N emergencies

Household salt, Sodium Chloride (NaCl), has been suggested as an appropriate material for retrospective and prospective optically stimulated luminescence (OSL) radiation dosimetry. The current paper investigates the potential application of NaCl pellets during a radiological and/or nuclear emergency, together with an existing portable reader, for application as a novel tool for in situ screening of individual doses in exposed populations.

The evaluation of the portable reader's performance was assessed based on OSL and infra-red stimulated luminescence (IRSL) methods and the results were compared to two research readers, Risø TL/OSL (DA-20 and DA-15). For the studied absorbed dose range (0.63–487 mGy), it was found that five pellets are needed in the portable reader to achieve a similar OSL signal magnitude as using one pellet in the two research readers. The OSL results of the three readers show similar minimum detectable dose (MDD) values and similar linear trends for the obtained OSL dose response curves, within the studied dose range. The IRSL results show a lower IRSL signal for the portable reader, leading to higher MDD values compared to the stationary readers. The MDD can reach down to 2.3 and 47 μGy, respectively, for OSL and IRSL measurements of NaCl with the SUERC portable reader.

Furthermore, sensitization tests show a dose dependent increase in the OSL and IRSL signals. In addition, the possibility of reading the same pellets more than once was confirmed through an advanced protocol, which combines multiple read-outs, and a time delay test. If a combination of OSL and IRSL measurements is applied, it is important to adjust the stimulation length if the first is OSL, while in the case that the first measurement is IRSL, the OSL signal is independent of the IRSL stimulation length.

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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.