Radiation Measurements最新文献_第2页

Carbon loaded TLDs: Utility in radiotherapy 碳负载tld：在放射治疗中的应用

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-28 DOI: 10.1016/j.radmeas.2026.107626

Zakia Lagha Ameur , Peta Lonski , Tomas Kron

Background

Thermoluminescence dosimetry (TLD) is a well-established dosimetric technique with large range of materials and sensitivities. To extend the use of TLD to surface dose measurements, carbon-loaded TLDs—commonly referred to as "black TLDs"—have been developed. The inclusion of carbon in the TLD matrix reduces the effective detector volume by limiting the emission of luminescence to a shallow surface layer, with the carbon concentration dictating the detection depth.

Methods

A set of 50 carbon-loaded LiF:Mg,Ti (RadPro) round chips (0.9 mm thick, 4.5 mm diameter) were commissioned using a programmable Lexsyg Smart reader suitable for thermos- and optically stimulated luminescence (OSL) dosimetry. Detection limit, dose response and reproducibility were determined and a correction for light emitted from the side wall of the TLD chips developed. The effective depth of measurement was determined in the build-up region of 6, 10 and 18 MV megavoltage photon beams (Varian Truebeam) in comparison with a thin window plane parallel ionisation chamber (IBA, advanced Markus type).

Results

The readout of the TLDs was reproducible within 1.9 % (2SD) and they showed typical supralinear response at doses exceeding 1 Gy. A correction applied for light emission from the side wall of the chips reduced the effective reading at the surface in MV X-rays to within 18 % of the dose measured with the ionisation chamber.

Conclusion

Mixing carbon with the active TL material creates an opportunity to restrict readout of dosimeters to regions of interest. There are several clinical applications that can benefit including in vivo dosimetry on patients’ skin, source strength verification for beta emitters and dosimetry in electronic brachytherapy.

热释光剂量法（TLD）是一种成熟的剂量测定技术，具有广泛的材料范围和灵敏度。为了将TLD的使用扩展到表面剂量测量，碳负载TLD -通常被称为“黑色TLD”-已经开发出来。碳在TLD基体中的包裹体通过将发光发射限制在浅层表层来减少有效探测器体积，碳浓度决定探测深度。方法采用可编程Lexsyg Smart读卡器对50组载碳的liff:Mg，Ti （RadPro）圆形芯片（0.9 mm厚，4.5 mm直径）进行热激发发光（OSL）剂量测定。确定了检测限、剂量响应和再现性，并对TLD芯片侧壁发出的光进行了校正。通过与薄窗面平行电离室（IBA，先进Markus型）的比较，确定了6、10和18 MV兆伏光子束（Varian Truebeam）的累积区域的有效测量深度。结果在1.9 % （2SD）范围内重现性好，在剂量超过1 Gy时表现出典型的超线性反应。对芯片侧壁的光发射进行校正，将表面的MV x射线有效读数降低到电离室测量剂量的18%以内。结论：碳与活性TL材料混合产生了将剂量计读数限制在感兴趣区域的机会。有几种临床应用可以受益，包括患者皮肤的体内剂量测定，β发射器的源强度验证和电子近距离放射治疗中的剂量测定。

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引用次数: 0

Characterization of lithium fluoride fluorescent nuclear track detectors for linear energy transfer measurements in light-ion beams using confocal microscopy 用共聚焦显微镜表征用于光离子束线性能量传递测量的氟化锂荧光核径迹探测器

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-24 DOI: 10.1016/j.radmeas.2026.107623

I.D. Muñoz , M. Sankowska , A. Kilian , O. Jäkel , P. Bilski

Fluorescent nuclear track detectors (FNTDs) enable measurement of the linear energy transfer (LET) of heavy charged particles. Lithium fluoride (LiF) is widely used in solid-state dosimetry and has been shown to function as an FNTD, with all previous studies employing wide-field microscopy (WM). Compared with WM, confocal microscopy (CM) – while more complex and time-consuming – provides superior image quality, potentially allowing improved ion track visualization and detection. This study aims to establish the feasibility of imaging LiF crystals with CM to visualize ion tracks and measure LET. Single LiF crystals were irradiated with high-energy quasi-monoenergetic ⁴He-, ¹²C-, and ¹⁶O-ions. Following irradiation, samples underwent thermal treatment to enhance fluorescence intensity and were subsequently imaged with a confocal microscope. Single-ion tracks were reconstructed from the resulting images, and fluorescence intensity was correlated with the LET in water (LET_w). The results demonstrate that it is feasible to image single ion tracks in LiF using CM. Detection efficiency reached nearly 100 % for ¹⁶O-ions at LET_w = 50.4 keV μm⁻¹ and for ¹²C-ions at (31.8 and 10.6) keV μm⁻¹. Reduced efficiencies (∼50 %) were observed for ¹⁶O-ions at 18.9 keV μm⁻¹ and for ¹²C-ions at 17.9 keV μm⁻¹. For ⁴He-ions, the efficiency was approximately 30 %. The mean fluorescence track intensity increased with LET_w, consistent with previous findings. CM shows potential for LET measurements using LiF-based FNTDs. However, at this stage, no significant improvement was observed for CM compared with WM.

荧光核径迹探测器（FNTDs）能够测量重带电粒子的线性能量传递（LET）。氟化锂（LiF）广泛应用于固态剂量学，并已被证明具有FNTD的功能，所有先前的研究都采用宽视场显微镜（WM）。与WM相比，共聚焦显微镜（CM）虽然更复杂和耗时，但提供了更好的图像质量，有可能改善离子轨迹的可视化和检测。本研究旨在建立用CM成像LiF晶体以显示离子轨迹和测量LET的可行性。用高能准单能4He-、12C-和16o -离子辐照单晶。辐照后，对样品进行热处理以增强荧光强度，随后用共聚焦显微镜成像。根据所得图像重建了单离子轨迹，荧光强度与水中LET （LETw）相关。结果表明，用CM成像LiF中单离子轨迹是可行的。在lew = 50.4 keV μm - 1和（31.8和10.6）keV μm - 1下，16o -离子和12c -离子的检测效率接近100%。在18.9 keV μm - 1和17.9 keV μm - 1下，16o离子和12c离子的效率分别降低了50%。对于4he离子，效率约为30%。平均荧光径迹强度随LETw增加而增加，与先前的发现一致。CM显示了使用基于liff的FNTDs进行LET测量的潜力。然而，在这个阶段，与WM相比，CM没有明显的改善。

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引用次数: 0

Luminescent and dosimetric properties of CaSO4:RE,Mn (RE = Dy, Tb, Tm, Yb, Eu, Ce) phosphors synthesized by the slow evaporation method 慢蒸发法合成CaSO4:RE，Mn （RE = Dy, Tb, Tm, Yb, Eu, Ce）荧光粉的发光和剂量学性质

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-23 DOI: 10.1016/j.radmeas.2026.107624

Anderson M.B. Silva , Danilo O. Junot , Neilo M. Trindade , Divanizia N. Souza , Linda V.E. Caldas

This study investigates the luminescent and dosimetric properties of CaSO₄:Dy,Mn, CaSO₄:Tb,Mn, CaSO₄:Tm,Mn, CaSO₄:Yb,Mn, CaSO₄:Eu,Mn and CaSO₄:Ce,Mn composites synthesized via the slow evaporation route. Structural and compositional characterization was performed using X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS). The dosimetric performance of the materials was evaluated using Teflon-based pellets through thermoluminescence (TL) glow curve measurements. Additionally, Continuous Wave Optically Stimulated Luminescence (CW-OSL) measurements were conducted to assess their optical stimulation behavior. The TL emission spectra revealed characteristic transitions associated with both RE³⁺ and Mn²⁺ ions, with emission features strongly dependent on the specific dopant. The TL glow curves exhibited well-defined peaks in the UV and visible regions, with Tm,Mn, Dy,Mn and Tb,Mn codoped samples showing enhanced emissions at higher temperatures, a desirable feature for dosimetric applications. CW-OSL measurements demonstrated intense luminescence responses, particularly for the CaSO₄:Tm,Mn and CaSO₄:Ce,Mn compositions. A comprehensive dosimetric evaluation was conducted, including reproducibility, linearity and signal fading. Among the studied samples, CaSO₄:Tm,Mn exhibited the most stable TL response, while CaSO₄:Dy,Mn showed the superior OSL signal stability. Overall, the results demonstrate that these newly developed CaSO₄-based RE,Mn composites possess excellent dosimetric characteristics, highlighting their strong potential as TL/OSL radiation detectors.

研究了采用慢蒸发法合成的CaSO4:Dy，Mn, CaSO4:Tb,Mn, CaSO4:Tm,Mn, CaSO4:Yb,Mn, CaSO4:Eu，Mn和CaSO4:Ce，Mn复合材料的发光和剂量学性能。利用x射线衍射（XRD）和能谱分析（EDS）对其结构和成分进行了表征。利用聚四氟乙烯基微球，通过热释光（TL）发光曲线测量来评估材料的剂量学性能。此外，还进行了连续波光激发发光（CW-OSL）测量，以评估其光激发行为。TL发射光谱显示了与RE3+和Mn2+离子相关的特征跃迁，其发射特征强烈依赖于特定的掺杂剂。TL发光曲线在紫外区和可见光区显示出明确的峰，其中Tm，Mn, Dy，Mn和Tb，Mn共掺杂样品在较高温度下显示出增强的发射，这是剂量学应用的理想特征。CW-OSL测量显示出强烈的发光响应，特别是对于CaSO4:Tm，Mn和CaSO4:Ce，Mn组成。进行了全面的剂量学评价，包括再现性、线性和信号衰落。在所研究的样品中，CaSO4:Tm，Mn表现出最稳定的TL响应，而CaSO4:Dy，Mn表现出更好的OSL信号稳定性。总的来说，研究结果表明，这些新开发的caso4基RE，Mn复合材料具有良好的剂量学特性，突出了它们作为TL/OSL辐射探测器的强大潜力。

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引用次数: 0

Optimizing the feasibility of N-Vinyl caprolactam polymer gel dosimeter using saccharide sensitizer for medical dosimetry 糖敏化剂优化n -乙烯基己内酰胺聚合物凝胶剂量计用于医学剂量测定的可行性

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-16 DOI: 10.1016/j.radmeas.2026.107622

Molham M. Eyadeh , Khalid A. Rabaeh , Dua'a I. Bani Hamdan , Ali M. Almomani

In this work, the influence of glucose on the dose sensitivity of N-vinyl caprolactam based gel dosimeters (NVCL) is studied. Moreover, the radiation properties of the NVCL-glucose gel dosimeters such as temperature dependence, dose rate and energy dependence and temporal stability were investigated. The improved NVCL-glucose polymers were exposed to megavoltage photon beams from a medical linear accelerator at doses up to 20 Gy. The exposures were carried out at photon energies of 6–15 MV, dose rates between 50 and 500 cGy/min, and temperatures ranging from 10 °C to 30 °C. The transverse relaxation rate (R₂) of the gel samples was measured using a time-domain NMR relaxometer with a magnetic field strength of 0.5 T. The R₂-dose response was found to be linear up to a radiation dose of 10 Gy, where the dose sensitivity of the improved polymers exhibited a significant enhancement, achieving 0.37 s⁻¹ Gy⁻¹, which is twice the R₂-dose sensitivity of previous NVCL systems. Additionally, it was observed that the NVCL-glucose polymers were independent of dose rate and radiation energy. A decrease in R₂ dose sensitivity was observed with increasing scanning temperature. The optimized NVCL–glucose formulation remained stable for at least 7 days after irradiation, with no significant change in the R₂ dose response over this period. These findings highlight the potential of NVCL-glucose dosimeters for practical application in MRI/NMR based 3-D dose verification.

本文研究了葡萄糖对n -乙烯基己内酰胺凝胶剂量计（NVCL）剂量敏感性的影响。此外，研究了nvcl -葡萄糖凝胶剂量仪的温度依赖性、剂量率依赖性和能量依赖性以及时间稳定性。将改进的nvcl -葡萄糖聚合物暴露于来自医用直线加速器的高达20 Gy的兆伏光子光束中。照射的光子能量为6 ~ 15 MV，剂量率为50 ~ 500 cGy/min，温度为10℃~ 30℃。利用0.5 t磁场强度的时域核磁共振弛豫仪测量了凝胶样品的横向弛豫率（R2），发现R2剂量响应在辐射剂量为10 Gy时呈线性，其中改进聚合物的剂量灵敏度显着增强，达到0.37 s−1 Gy−1，是以前NVCL系统R2剂量灵敏度的两倍。此外，还观察到nvcl -葡萄糖聚合物与剂量率和辐射能量无关。R2剂量敏感性随扫描温度升高而降低。优化后的nvcl -葡萄糖制剂在辐照后至少7天保持稳定，在此期间R2剂量反应没有显著变化。这些发现突出了nvcl -葡萄糖剂量计在基于MRI/NMR的三维剂量验证中的实际应用潜力。

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引用次数: 0

Radiation exposure assessment in interventional radiology: Staff personal dosimetry and radiation protection in percutaneous transhepatic cholangiography 介入放射学中的辐射暴露评估：工作人员个人剂量测定和经皮经肝胆管造影中的辐射防护

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-16 DOI: 10.1016/j.radmeas.2026.107621

Isaías Petronis , Denise Y. Nersissian , Francisco S. Cancio , Nancy K. Umisedo , Elisabeth M. Yoshimura

Interventional radiology (IR) procedures are the key source of radiation exposure for healthcare workers. Personal dosimetry is essential to ensure that dose limits are respected and radiation protection is maintained. This study aimed to estimate the average radiation dose received by the healthcare team during the most common IR procedure at a university hospital in São Paulo, Brasil. Cumulative personal dose equivalent, H_p(10), was measured outside the lead apron using thermoluminescent dosimetry (TL) in 57 percutaneous transhepatic biliary cholangiography procedures, divided into biliary drain insertions and biliary drain replacement. Three interventional radiologists participate in each procedure, with distinct roles and positions around the patient. The effective dose per procedure for the three roles of the interventional radiologists were estimated. For the primary interventional radiologist, the values were (54 ± 2) μSv and (32 ± 1) μSv in primary drain insertion and drain replacement, respectively. Additionally, as patient dose indicator, the kerma-area product medians were estimated as 34.3 Gy cm² and 13.4 Gy cm² in primary drain insertions and drain replacements, respectively. Under controlled equipment settings, which simulates clinical procedures with acrylic slabs, TL readings showed strong linear correlations with measurements from an ionization chamber (R² = 0.979) and with the equipment dose indicator. The expected relationship between patient and staff doses was confirmed, in both clinical procedures and controlled settings. Finally, based on the results, recommendations were made regarding radiation protection at this facility, aiming to reduce both patient and staff exposure during this procedure.

介入放射（IR）程序是卫生保健工作者辐照的主要来源。个人剂量测定对于确保遵守剂量限值和维持辐射防护至关重要。本研究旨在估计巴西圣保罗一所大学医院的医疗团队在最常见的IR过程中接受的平均辐射剂量。在57例经皮经肝胆道造影手术中，采用热释光剂量法（TL）测量铅圈外累积个人剂量当量Hp(10)，分为胆道插入和胆道置换。每个手术都有三位介入放射科医生参与，他们在患者周围扮演着不同的角色和位置。估计了介入放射科医生三个角色的每次手术的有效剂量。对于初级介入放射科医师，初级插入引流管和更换引流管的数值分别为（54±2）μSv和（32±1）μSv。此外，作为患者剂量指标，初次插入引流管和更换引流管时的角膜面积产物中值分别估计为34.3 Gy cm2和13.4 Gy cm2。在受控的设备设置下，用丙烯酸板模拟临床程序，TL读数与电离室的测量值（R2 = 0.979）和设备剂量指示器显示出很强的线性相关性。在临床程序和对照环境中，证实了患者和工作人员剂量之间的预期关系。最后，根据结果，对该设施的辐射防护提出了建议，旨在减少患者和工作人员在此过程中的暴露。

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引用次数: 0

Study on a rapid measurement method for the deposition velocity of 220Rn progeny based on an imaging plate 基于成像板的220Rn子代沉积速度快速测量方法研究

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-15 DOI: 10.1016/j.radmeas.2026.107620

Yufan Liu, Kexin Wang, Wenjie Xu, Jialu Feng, Tao Ao, Lidan Lv, Qingzhi Zhou, Zhengzhong He

The study of the deposition behavior of

^{220} Rn

progeny is crucial for the assessment of public and occupational radiation doses and for controlling progeny concentration in a thoron chamber. To address the difficulty of maintaining stable environmental conditions over long durations when studying deposition velocity variations, a rapid and accurate method for the deposition velocity measurement of

^{220} Rn

progeny is proposed in this study, based on a BAS-TR imaging plate (IP), which has advantages of high sensitivity, large detection area and portability. In this research, measurement procedures were optimized based on the analysis of uncertainty, whereby the total time for a single measurement can be limited within 8 h. A dedicated Python program was developed for the automatic processing of IP count data, and key parameters such as IP detection efficiency, IP scanner sensitivity, and IP fading correction were determined through experiments. Comparative experiment was conducted between IP and a calibrated alpha spectroscopy, with results showing good agreement between two method. This method was preliminarily applied on

^{220} Rn

progeny deposition velocity measurement using collection plates of different sizes. Compared to traditional techniques, multi-sample, large-area measurements of deposition velocity can be completed within 8 hours using the proposed method, thereby providing an new efficient approach for the study of the deposition of

^{220} Rn

progeny and other radionuclides.

研究220Rn子体的沉积行为对于评估公众和职业辐射剂量以及控制钍室子体浓度至关重要。针对研究沉积速度变化时难以长时间保持稳定环境条件的问题，本研究提出了一种基于BAS-TR成像板（IP）的220Rn子代沉积速度快速准确测量方法，该方法具有灵敏度高、检测面积大、便携性好等优点。本研究在不确定度分析的基础上对测量程序进行了优化，将单次测量的总时间控制在8 h以内。开发了专用Python程序对IP计数数据进行自动处理，并通过实验确定了IP检测效率、IP扫描器灵敏度、IP衰落校正等关键参数。将IP法与标定后的α光谱法进行了对比实验，结果表明两者吻合较好。该方法初步应用于不同尺寸采集板的220Rn子代沉积速度测量。与传统方法相比，该方法可在8小时内完成多样品、大面积的沉积速度测量，为研究220Rn子代及其他放射性核素的沉积提供了一种新的高效方法。

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引用次数: 0

Commissioning of radiophotoluminescent dosimetry system for radiotherapy dosimetry audits - feasibility and pilot study results in Bulgaria 用于放射治疗剂量测定审计的放射光致发光剂量测定系统的调试——保加利亚的可行性和试点研究结果

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-14 DOI: 10.1016/j.radmeas.2026.107619

Gueorgui Gueorguiev , Tsvetelina Todorova , Bozhidar Vladimirov , Filip Simeonov , Katia Sergieva

This study depicts how a nationwide remote dosimetry audit (RDA) system in radiotherapy, utilizing radiophotoluminescent dosemeters, was commissioned and validated in Bulgaria. The work outlines the commissioning process of the dosimetry system, presents the organization of the RDA feasibility study, and describes how a preliminary clinical audit was carried out in Bulgaria, with determination of absorbed dose correction factors as an integral part of the commissioning process. After successful commissioning of the RDA system, the dosimetric accuracy of the absorbed dose to water at the reference point under reference conditions was evaluated during both the feasibility study and the clinical audit. Across all investigated photon beam energies (6 MV, 10 MV, 15 MV, 6 MV FFF, and 10 MV FFF), the differences between the stated doses and the RPLD-measured doses ranged from −1.5 % to +4.0 % during the feasibility phase and from −1.5 % to +2.0 % during the first clinical audits, with all deviations remaining well within the ±5 % acceptance tolerance. The findings of the feasibility study and the preliminary clinical results indicate that the proposed RDA methodology is viable for implementation in Bulgarian radiotherapy centers.

本研究描述了如何在保加利亚使用放射光致发光剂量计进行全国范围的放射治疗远程剂量审计（RDA）系统的委托和验证。该工作概述了剂量测定系统的调试过程，介绍了RDA可行性研究的组织，并描述了如何在保加利亚进行初步临床审计，并将确定吸收剂量校正系数作为调试过程的一个组成部分。在RDA系统成功调试后，在可行性研究和临床审核期间，评估了参考条件下参考点对水的吸收剂量的剂量学准确性。在所有研究的光子束能量（6 MV、10 MV、15 MV、6 MV FFF和10 MV FFF）中，所述剂量与rpld测量剂量之间的差异在可行性阶段为- 1.5%至+ 4.0%，在第一次临床审计期间为- 1.5%至+ 2.0%，所有偏差都保持在±5%的可接受公差范围内。可行性研究的结果和初步临床结果表明，拟议的RDA方法在保加利亚放射治疗中心实施是可行的。

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引用次数: 0

Uniformity of heating across sample holders during luminescence measurements 发光测量时样品夹加热均匀性

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-13 DOI: 10.1016/j.radmeas.2026.107617

J.A. Winzar, G.A.T. Duller, H.M. Roberts

For luminescence research, samples are often heated prior to and/or during measurement to measure the thermoluminescence (TL) signal or to remove charge from shallow traps. The reproducibility and repeatability of luminescence measurements will be influenced by how consistently and uniformly the samples are heated, both within a single aliquot and between different readers or sample positions. While the effects of temperature lag during heating have been intensively studied, the spatial uniformity of temperature across samples has received less attention.

This study presents spatially-resolved measurements of the temperature of the heating strip, a steel cup and an aluminium single grain disc in a Risø TL/OSL DA20 reader. Temperature is calculated using black body emissions from the three materials, detected with an Electron Multiplying Charge Coupled Device (EMCCD). The results show that temperature is not spatially uniform across any of the three materials, although the degree of variation differs between them. The largest temperature variation is observed across the steel cup (∼18 % at a temperature of 500 °C), followed by the heating strip (∼8 % at a temperature of 500 °C), and then the single grain disc (∼2 % at a temperature of 250 °C). The steel cup also has greater anisotropy in temperature compared to the single grain disc. This study suggests that spatial variation in temperature can be minimised by using sample holders made of materials with high thermal conductivity (e.g. aluminium or silver), and that the impact of thermal variation can be reduced by restricting samples to the central portion of a sample holder (e.g. the central 2 mm of a sample holder (i.e. ‘small aliquots’)).

对于发光研究，通常在测量之前和/或测量期间对样品进行加热，以测量热释光（TL）信号或从浅阱中去除电荷。发光测量的再现性和可重复性将受到样品加热的一致性和均匀性的影响，无论是在单个等温线内还是在不同的读取器或样品位置之间。虽然加热过程中温度滞后的影响已经得到了深入的研究，但样品间温度的空间均匀性却受到较少的关注。本研究提出了在Risø TL/OSL DA20读取器中加热带，钢杯和铝单晶粒盘的空间分辨率测量。用电子倍增电荷耦合器件（EMCCD）检测三种材料的黑体辐射来计算温度。结果表明，三种材料的温度在空间上并不均匀，尽管它们之间的变化程度不同。温度变化最大的是钢杯（在500℃温度下为~ 18%），其次是加热带（在500℃温度下为~ 8%），然后是单晶圆盘（在250℃温度下为~ 2%）。与单晶粒圆盘相比，钢杯在温度上也具有更大的各向异性。该研究表明，可以通过使用高导热材料（例如铝或银）制成的样品架来最小化温度的空间变化，并且可以通过将样品限制在样品架的中心部分（例如样品架的中心2毫米（即“小等分”））来减少热变化的影响。

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引用次数: 0

A new method for the determination of 210Po in environmental samples using plastic scintillation resins 建立了用塑料闪烁树脂测定环境样品中210Po的新方法

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-12 DOI: 10.1016/j.radmeas.2026.107618

Jordi Rotger , Joana Tent , Hector Bagán , Anna Rigol , Àlex Tarancón

We have developed a new method using a selective plastic scintillation resin (PSresin) based on Aliquat-336 for analysing ²¹⁰Po in water samples. The PSresin effectively isolates ²¹⁰Po while removing main interferences such as ²¹⁰Pb and ²¹⁰Bi by loading the sample in a HCl 1 mol L⁻¹ medium and rinsing with HCl 1 mol L⁻¹ and 6.25 mol L⁻¹, consecutively. We optimized the rinse volumes and conducted a search for suitable chemical analogues of polonium to be used as tracers throughout the procedure. Zinc and cadmium were identified as the most suitable elements for preconcentration and separation of ²¹⁰Po on the PSresin. We compared our PSresin method with reference methods (UNE-EN ISO 13161 and IAEA/AQ/12) based on alpha spectrometry by analysing drinking water samples. The results showed that the PSresin method is faster and provides accurate results, although the alpha spectrometry methods achieve lower detection limits.

我们开发了一种基于Aliquat-336的选择性塑料闪烁树脂（PSresin）分析水样中210Po的新方法。通过将样品装于HCl 1 mol L−1介质中，连续用HCl 1 mol L−1和6.25 mol L−1洗涤，PSresin可以有效地分离210Po，同时去除210Pb和210Bi等主要干扰。我们优化了漂洗体积，并在整个过程中寻找合适的化学类似物作为示踪剂。锌和镉是最适合在PSresin上富集分离210Po的元素。通过对饮用水样品的α光谱分析，将PSresin方法与参考方法（UNE-EN ISO 13161和IAEA/AQ/12）进行了比较。结果表明，虽然α光谱法的检出限较低，但PSresin法速度更快，结果准确。

引用次数: 0

Optical response characterization of dyed-polymethyl methacrylate (PMMA) dosimeters under high-dose X-ray irradiation 高剂量x射线照射下染色聚甲基丙烯酸甲酯（PMMA）剂量计的光学响应特性

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements

Pub Date : 2026-01-09 DOI: 10.1016/j.radmeas.2026.107614

Y.Q. Aguiar , M. Avesani , A. Raj Mandal , X. Li , V. Hutanu , A. Morana , R. García Alía , S. Girard , M. Ferrari

This study assesses the suitability of commercial dyed polymethyl methacrylate (PMMA) dosimeters for high-dose radiation applications extending into the hundreds of kilograys. Three PMMA dosimeter types (Gammachrome YR+, Amber 3042, and Red 4034) were investigated using both online and post-irradiation optical transmission measurements in the visible spectral range. The objective was to evaluate their dose sensitivity beyond nominal operational limits and to characterize their optical response through multi-wavelength transmittance and radiation-induced attenuation (RIA) analyses. Dosimeters were exposed to X-rays at dose rates of 0.9 and 1.2 Gy[H

_{2}

O]/s, covering doses from 0.1 Gy to 282 kGy. Monte Carlo simulations using the PHITS code were performed to model radiation transport and dose deposition in the different materials. The results demonstrate a clear, dose-dependent optical response of dyed PMMA, with wavelength-specific behavior indicative of color-center formation and evolution. Recovery measurements show that the RIA signal is highly stable over several hours at nominal wavelengths, with only minor relaxation observed in the near-infrared region, supporting the applicability of these dosimeters for both real-time and passive measurements. Comparisons with Radiophotoluminescent (RPL) FD-7 dosimeters reveal consistent trends, suggesting the potential for establishing a conversion between RPL and PMMA dose responses. Overall, the findings support the extension of dyed-PMMA dosimetry beyond current commercial limits and contribute to the development of robust dosimetry techniques for extreme radiation environments.

本研究评估了商用染色聚甲基丙烯酸甲酯（PMMA）剂量计在数百公斤高剂量辐射应用中的适用性。研究了三种PMMA剂量计类型（Gammachrome YR+、Amber 3042和Red 4034）在可见光光谱范围内的在线和辐照后光透射测量。目的是评估其超出名义操作极限的剂量敏感性，并通过多波长透射率和辐射诱发衰减（RIA）分析表征其光学响应。剂量计暴露于剂量率为0.9和1.2 Gy[H2O]/s的x射线下，剂量范围为0.1 Gy至282 kGy。使用PHITS代码进行蒙特卡罗模拟，模拟不同材料中的辐射传输和剂量沉积。结果表明，染色PMMA具有清晰的剂量依赖性光学响应，具有波长特异性行为，指示色中心的形成和演变。恢复测量表明，在标称波长下，RIA信号在几个小时内高度稳定，在近红外区域只观察到轻微的松弛，支持这些剂量计在实时和被动测量中的适用性。与放射光致发光（RPL） FD-7剂量计的比较显示出一致的趋势，表明在RPL和PMMA剂量反应之间建立转换的潜力。总的来说，研究结果支持将染色pmma剂量学扩展到目前的商业限制之外，并有助于开发用于极端辐射环境的强大剂量学技术。

{"title":"Optical response characterization of dyed-polymethyl methacrylate (PMMA) dosimeters under high-dose X-ray irradiation","authors":"Y.Q. Aguiar , M. Avesani , A. Raj Mandal , X. Li , V. Hutanu , A. Morana , R. García Alía , S. Girard , M. Ferrari","doi":"10.1016/j.radmeas.2026.107614","DOIUrl":"10.1016/j.radmeas.2026.107614","url":null,"abstract":"<div><div>This study assesses the suitability of commercial dyed polymethyl methacrylate (PMMA) dosimeters for high-dose radiation applications extending into the hundreds of kilograys. Three PMMA dosimeter types (Gammachrome YR+, Amber 3042, and Red 4034) were investigated using both online and post-irradiation optical transmission measurements in the visible spectral range. The objective was to evaluate their dose sensitivity beyond nominal operational limits and to characterize their optical response through multi-wavelength transmittance and radiation-induced attenuation (RIA) analyses. Dosimeters were exposed to X-rays at dose rates of 0.9 and 1.2 Gy[H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O]/s, covering doses from 0.1 Gy to 282 kGy. Monte Carlo simulations using the PHITS code were performed to model radiation transport and dose deposition in the different materials. The results demonstrate a clear, dose-dependent optical response of dyed PMMA, with wavelength-specific behavior indicative of color-center formation and evolution. Recovery measurements show that the RIA signal is highly stable over several hours at nominal wavelengths, with only minor relaxation observed in the near-infrared region, supporting the applicability of these dosimeters for both real-time and passive measurements. Comparisons with Radiophotoluminescent (RPL) FD-7 dosimeters reveal consistent trends, suggesting the potential for establishing a conversion between RPL and PMMA dose responses. Overall, the findings support the extension of dyed-PMMA dosimetry beyond current commercial limits and contribute to the development of robust dosimetry techniques for extreme radiation environments.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"192 ","pages":"Article 107614"},"PeriodicalIF":2.2,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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