Radiation Measurements最新文献_第2页

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。

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引用次数: 0

Swift heavy ion and UV irradiation of natural cryolite (Na3AlF6) 天然冰晶石（Na3AlF6）的快速重离子和紫外辐照

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.2026.107606

Anna Szreter , Adrian A. Finch , Henrik Friis , Christina Trautmann , Frieder Koch , Ina Schubert

The successful application of fluorides in dosimetry and optics has encouraged study of the optical properties of doped cryolite and cryolite-structure materials. However, natural cryolite (Na₃AlF₆) has never been described in terms of its defect structure, crucial for optical applications. To address this knowledge gap, we irradiate cryolite with ²³⁸U ions and use excitation lifetime photoluminescence to constrain the defect structures formed. Untreated, high-energy ion and UV-irradiated samples are compared in terms of their emission spectra and luminescence lifetimes. Particle irradiation introduces an orange colour to originally black, purple and white cryolite. Untreated cryolite shows blue emissions at ∼2.86 and ∼2.60 eV (435 and 475 nm) and a green emission at 2.27 eV (545 nm). After uranium ion irradiation, the green luminescence intensity is enhanced compared to blue emissions. Subsequent ultraviolet irradiation causes ∼57 % reduction in the dark blue emission intensity and 40–70 % increase in green. All luminescence lifetimes are prolonged by particle irradiation, but stay in the nanosecond range. We infer that a vacancy-related defect is produced by particle and UV irradiation and responsible for the green luminescence. Another defect, presumably electronic, is removed by particle irradiation and UV. The ∼2.27 eV green luminescence centre is interpreted as an F-centre localised on a fluorine vacancy. The blue luminescence centres are interpreted as electron-hole pairs, localised at the AlF₆ octahedron normal lattice sites for ∼2.86 eV and octahedral defect sites for ∼2.60 eV. The experiment provides insight into natural defect formation processes in cryolite from the Ivittuut deposit in Southern Greenland.

氟化物在剂量学和光学中的成功应用鼓励了对掺杂冰晶石和冰晶石结构材料光学性质的研究。然而，天然冰晶石（Na3AlF6）从未被描述过其缺陷结构，这对光学应用至关重要。为了解决这一知识差距，我们用238U离子照射冰晶石，并使用激发寿命光致发光来约束形成的缺陷结构。未经处理，高能离子和紫外线照射的样品在其发射光谱和发光寿命方面进行了比较。粒子照射使原本为黑色、紫色和白色的冰晶石呈现橙色。未经处理的冰晶石在~ 2.86和~ 2.60 eV（435和475 nm）处显示蓝色发射，在2.27 eV （545 nm）处显示绿色发射。经过铀离子辐照后，绿色发光强度比蓝色发光强度增强。随后的紫外线照射导致深蓝色发射强度降低~ 57%，绿色发射强度增加40 - 70%。所有的发光寿命都被粒子照射延长，但保持在纳秒范围内。我们推断，粒子和紫外线照射产生了与空位相关的缺陷，并负责绿色发光。另一个缺陷，可能是电子的，通过粒子照射和紫外线去除。~ 2.27 eV的绿色发光中心被解释为定位在氟空位上的f中心。蓝色发光中心被解释为电子-空穴对，定位于AlF6八面体正规格位（~ 2.86 eV）和八面体缺陷位（~ 2.60 eV）。该实验提供了对格陵兰岛南部Ivittuut矿床冰晶石自然缺陷形成过程的深入了解。

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引用次数: 0

Raman spectroscopy investigation of age-related radiation effects on fingernail molecular structure for individual-based ESR dosimetry 拉曼光谱研究年龄相关辐射对指甲分子结构的影响，用于基于个体的ESR剂量测定

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

Radiation Measurements

Pub Date : 2026-01-08 DOI: 10.1016/j.radmeas.2026.107615

Samayeh Azariasl , Hideaki Fujita , Tomonobu M. Watanabe , Hiroshi Yasuda

Accurate retrospective dosimetry is essential in nuclear and radiological emergency responses. The technique of measuring electron spin resonance (ESR) signals from fingernails offers a non-invasive method for retrospective dosimetry of hand exposure. In this study, we explored the use of Raman spectroscopy to investigate molecular structural differences in fingernails and their correlation with ESR signal characteristics. Fingernail and toenail samples collected from 12 donors aged 10–70 years were irradiated with 20 Gy X-rays (160 kVp, 6.3 mA) and subsequently measured using ESR spectrometry and Raman spectroscopy. The post-irradiation (20 Gy) Raman spectra showed a significant decrease in the ratio of normalized S–S/C–C peak area across all age groups, dropping from 0.46 to 0.28 (10–20 years old), 0.51 to 0.26 (20–50 y/o), and 0.75 to 0.43 (50–70 y/o). These results indicated radiation-induced disruption of disulfide bonds, revealing age-dependent variations in bond stability and protein structure, with younger individuals exhibiting stronger molecular structures and higher intensities of radiation-induced ESR signals. These findings on the radiation effects on the molecular structural changes of fingernails would contribute to the achievement of more accurate, individual-based fingernail dosimetry.

准确的回顾性剂量测定在核和辐射应急反应中至关重要。测量手指甲电子自旋共振（ESR）信号的技术为手部暴露的回顾性剂量测定提供了一种非侵入性的方法。在这项研究中，我们探索了利用拉曼光谱来研究指甲的分子结构差异及其与ESR信号特征的相关性。从12名年龄在10-70岁的供体中采集指甲和脚趾甲样本，用20 Gy x射线（160 kVp, 6.3 mA）照射，随后使用ESR光谱和拉曼光谱进行测量。辐照后（20 Gy）拉曼光谱显示，各年龄组归一化S-S / C-C峰面积比值显著下降，从0.46降至0.28（10-20岁），从0.51降至0.26 (20 - 50 y/o)，从0.75降至0.43 （50-70 y/o）。这些结果表明，辐射诱导的二硫键破坏，揭示了键稳定性和蛋白质结构的年龄依赖性变化，年轻个体表现出更强的分子结构和更高强度的辐射诱导ESR信号。这些关于辐射对指甲分子结构变化的影响的发现将有助于实现更准确的、基于个体的指甲剂量测定。

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引用次数: 0

Scintillation characteristics of Eu-doped barium fluoroiodide translucent ceramics 掺铕氟化钡半透明陶瓷的闪烁特性

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

Radiation Measurements

Pub Date : 2026-01-08 DOI: 10.1016/j.radmeas.2026.107616

Shota Otake, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida

Eu:BaFI translucent ceramics were successfully fabricated for the first time, and their optical and scintillation properties were systematically investigated. In the photoluminescence (PL) measurements, an emission band originating from Eu²⁺ was observed at 405 nm, with a lifetime of approximately 0.4–0.5 μs. PL quantum yields for the samples with 0.05, 0.1, 0.5, and 1 % Eu were 8, 20, 62, and 89 %, respectively. In the X-ray-induced scintillation spectra, in addition to the Eu²⁺ luminescence, a broad band around 490 nm was observed, which is attributed to the recombination of self-trapped excitons or anion defects in the host lattice. Afterglow levels of the Eu:BaFI samples following X-ray irradiation were approximately 300–400 ppm, comparable to that of a commercial Tl:CsI scintillator. Under ¹³⁷Cs γ-ray irradiation, scintillation light yields of the 0.05, 0.1, 0.5, and 1 % Eu:BaFI samples were estimated to be 4,400, 14,000, 25,000, and 19,000 photons/MeV, respectively.

首次成功制备了Eu:BaFI半透明陶瓷，并对其光学和闪烁性能进行了系统的研究。在光致发光（PL）测量中，在405 nm处观察到来自Eu2+的发射带，其寿命约为0.4 ~ 0.5 μs。在含有0.05、0.1、0.5和1% Eu的样品中，PL量子产率分别为8%、20%、62%和89%。在x射线诱导的闪烁光谱中，除了Eu2+发光外，还观察到约490 nm的宽频带，这归因于宿主晶格中自捕获激子的重组或阴离子缺陷。Eu:BaFI样品在x射线照射后的余辉水平约为300 - 400ppm，与商用Tl:CsI闪烁体相当。在137Cs γ射线照射下，0.05、0.1、0.5和1% Eu:BaFI样品的闪烁产光量分别为4,400、14,000、25,000和19,000光子/MeV。

引用次数: 0

Optical and scintillation properties of Tb-doped NaGd(WO4)2 single crystals 掺tb的NaGd(WO4)2单晶的光学和闪烁特性

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

Radiation Measurements

Pub Date : 2026-01-02 DOI: 10.1016/j.radmeas.2026.107605

Kodai Makino , Hiromi Kimura , Daiki Shiratori , Kensei Ichiba , Kenichi Watanabe , Takeshi Fujiwara , Takayuki Yanagida , Yutaka Fukuchi , Hidetoshi Kato

Tb-doped NaGd(WO₄)₂ (NGW) single crystals with various concentrations (0.1, 0.5, 1.0, 2.0, 5.0, and 10.0 %) were successfully synthesized by the floating zone method. The synthesized crystals were evaluated in terms of their optical and scintillation properties. Under X-ray excitation, sharp emission peaks around 550 nm were observed, corresponding to the typical 4f–4f transitions of Tb³⁺. The measured scintillation decay times (1.0–1.6 ms) were consistent with those typically observed for the 4f–4f transitions of Tb³⁺. Moreover, the 5.0 % Tb-doped NGW single crystal, having the highest scintillation intensity, exhibited a light yield of 1675 photons/MeV.

采用浮区法成功合成了不同掺杂浓度（0.1、0.5、1.0、2.0、5.0、10.0%）的铌掺杂NaGd(WO4)2 （NGW）单晶。根据其光学和闪烁特性对合成的晶体进行了评价。在x射线激发下，在550 nm附近观察到尖锐的发射峰，对应于Tb3+典型的4f-4f跃迁。测量到的闪烁衰减时间（1.0-1.6 ms）与Tb3+的4f-4f跃迁的典型观测结果一致。此外，掺杂5.0% tb的NGW单晶具有最高的闪烁强度，产光量为1675光子/MeV。

引用次数: 0

New high light yield ceramics scintillators (Gd,Y,Pr, Ce)3Al2Ga3O12 and (Gd,Y,Pr, Tb)3Al2Ga3O12 新型高光产率陶瓷闪烁体（Gd，Y,Pr, Ce）3Al2Ga3O12和（Gd，Y,Pr, Tb）3Al2Ga3O12

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

Radiation Measurements

Pub Date : 2026-01-02 DOI: 10.1016/j.radmeas.2026.107604

M. Korzhik , V. Smyslova , A. Bondarau , V. Dubov , E. Borisevich , K. Ivanovskikh , D. Lelekova , P. Karpyuk , I. Komendo , V. Mechinsky , V. Pustovarov , D. Tavrunov

The scintillation and phosphorescence properties of (Gd,Y,Pr,Ce)₃Al₂Ga₃O₁₂ and (Gd,Y,Pr,Tb)₃Al₂Ga₃O₁₂ transparent ceramics were systematically investigated for the first time. The results demonstrated that long lasting phosphorescence, which is a well-known phenomenon in Pr³⁺-doped aluminium-gallium garnets, can be effectively suppressed at the double doping or high concentration of Pr³⁺ ions in the compound. The scintillation light yield of Ce³⁺, Tb³⁺ and Pr³⁺ co-doped ceramics was found to be over the ceramics doped solely with Ce³⁺ and Tb³⁺ and showing dependence on praseodymium dopant concentration. These findings suggest that Pr³⁺-codoped garnets maintain high scintillation yield making these materials promising for applications in detectors for different imaging techniques utilising pulse counting and current measurement modes.

首次系统地研究了（Gd，Y,Pr,Ce）3Al2Ga3O12和（Gd，Y,Pr,Tb）3Al2Ga3O12透明陶瓷的闪烁和磷光特性。结果表明，Pr3+掺杂铝镓石榴石中常见的长时间磷光现象，在双掺杂或高浓度的Pr3+离子下可以有效抑制。Ce3+、Tb3+和Pr3+共掺杂陶瓷的闪烁光产率高于单独掺杂Ce3+和Tb3+的陶瓷，且与镨掺杂浓度有关。这些发现表明，Pr3+共掺杂石榴石保持较高的闪烁产率，使这些材料有望应用于利用脉冲计数和电流测量模式的不同成像技术的探测器中。

{"title":"New high light yield ceramics scintillators (Gd,Y,Pr, Ce)3Al2Ga3O12 and (Gd,Y,Pr, Tb)3Al2Ga3O12","authors":"M. Korzhik , V. Smyslova , A. Bondarau , V. Dubov , E. Borisevich , K. Ivanovskikh , D. Lelekova , P. Karpyuk , I. Komendo , V. Mechinsky , V. Pustovarov , D. Tavrunov","doi":"10.1016/j.radmeas.2026.107604","DOIUrl":"10.1016/j.radmeas.2026.107604","url":null,"abstract":"<div><div>The scintillation and phosphorescence properties of (Gd,Y,Pr,Ce)<sub>3</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> and (Gd,Y,Pr,Tb)<sub>3</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> transparent ceramics were systematically investigated for the first time. The results demonstrated that long lasting phosphorescence, which is a well-known phenomenon in Pr<sup>3+</sup>-doped aluminium-gallium garnets, can be effectively suppressed at the double doping or high concentration of Pr<sup>3+</sup> ions in the compound. The scintillation light yield of Ce<sup>3+</sup>, Tb<sup>3+</sup> and Pr<sup>3+</sup> co-doped ceramics was found to be over the ceramics doped solely with Ce<sup>3+</sup> and Tb<sup>3+</sup> and showing dependence on praseodymium dopant concentration. These findings suggest that Pr<sup>3+</sup>-codoped garnets maintain high scintillation yield making these materials promising for applications in detectors for different imaging techniques utilising pulse counting and current measurement modes.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"192 ","pages":"Article 107604"},"PeriodicalIF":2.2,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981059","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}

引用次数: 0

Geant4 modeling the response of boron-doped CR-39 nuclear track detector in fast neutron fields and its experimental evaluation Geant4模拟掺硼CR-39核径迹探测器在快中子场中的响应及其实验评价

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

Radiation Measurements

Pub Date : 2025-12-29 DOI: 10.1016/j.radmeas.2025.107587

S. Mohammadian , A. Moslehi , S. Baradaran , M. Sohani

In this work, the response of a boron-doped CR-39 detector in fast neutron fields is modeled using the Geant4 toolkit. A track is counted when the trajectory of a secondary charged particle capable of forming a track passes through the etched thickness at an angle greater than a critical value relative to the CR-39 surface. For a boron concentration of 4%, the calculated track density shows the best agreement with measurements in the ²⁴¹Am-Be field, with a difference of 7.8%. The model is then used to calculate the track density for several fast neutron energies ranging from 0.1 to 14 MeV. The results reveal that as neutron energy increases, the track density per unit personal dose equivalent decreases. This indicates that the CR-39 sensitivity differs between calibration and measurement fields. Therefore, correcting the CR-39 response is necessary to ensure consistent sensitivity across different neutron energies and to reduce the uncertainty in dose measurements.

在这项工作中，使用Geant4工具包对掺硼CR-39探测器在快中子场中的响应进行了建模。当能够形成轨迹的二次带电粒子的轨迹以大于相对于CR-39表面的临界值的角度穿过蚀刻厚度时，计算轨迹。当硼浓度为4%时，计算的径迹密度与241Am-Be油田的测量结果最吻合，相差7.8%。利用该模型计算了0.1 ~ 14mev快中子的径迹密度。结果表明，随着中子能量的增加，单位个人剂量当量径迹密度减小。这表明CR-39的灵敏度在校准场和测量场之间存在差异。因此，修正CR-39响应是必要的，以确保在不同中子能量下的一致灵敏度，并减少剂量测量的不确定性。

引用次数: 0

Investigation of the dosimetric properties of K2SO4:Cu,Na detectors with varying phosphor and binder content using infrared-stimulated luminescence (IRSL) 红外激发发光（IRSL）研究不同荧光粉和结合剂含量的K2SO4:Cu，Na探测器的剂量学性质

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

Radiation Measurements

Pub Date : 2025-12-28 DOI: 10.1016/j.radmeas.2025.107603

Renata Majgier

K₂SO₄:Cu,Na is as a very sensitive phosphor for infrared stimulated luminescence (IRSL), and adding sodium as a co-dopant significantly enhances its dosimetric properties. This study focuses on the initial optimization of the K₂SO₄:Cu,Na phosphor for use as a passive detector with the IRSL method for reading dose information. Various detector configurations were prepared by mixing the phosphor powder with binders such as Teflon and silicone in different ratios. Key dosimetric characteristics: signal repeatability, dose-response, minimum detectable dose (MDD), and signal fading were evaluated. The dose-response relationship was found to be linear within the range of at least 3 mGy to 1 Gy. In several samples, the MDD was below 1 μGy. The material exhibited ∼50 % signal loss after three months of storage. To address this fading, preheating procedures before IRSL readout were tested, aiming to stabilize the IRSL signal over time. It was shown that preheating prevented signal loss for up to one month post-irradiation, and significantly reduced long-term fading compared to untreated samples. The results highlight the promising potential of K₂SO₄:Cu,Na phosphor in radiation dosimetry applications.

K2SO4:Cu，Na是一种对红外激发发光（IRSL）非常敏感的荧光粉，加入钠作为共掺杂剂可显著提高其剂量学性能。本研究主要研究了K2SO4:Cu，Na荧光粉作为被动检测器的初始优化，并采用IRSL方法读取剂量信息。将荧光粉与聚四氟乙烯、有机硅等粘结剂按不同比例混合，制备出不同的探测器结构。评估了关键的剂量学特征：信号可重复性、剂量反应、最小可检测剂量（MDD）和信号衰减。在至少3mgy至1gy的范围内，剂量-反应关系呈线性关系。在一些样品中，MDD低于1 μGy。该材料在储存三个月后表现出约50%的信号损失。为了解决这种衰减问题，在测试IRSL读数之前进行预热程序，旨在随着时间的推移稳定IRSL信号。研究表明，与未经处理的样品相比，预热可以防止辐射后长达一个月的信号损失，并显着减少长期褪色。结果表明，K2SO4:Cu，Na荧光粉在辐射剂量学方面具有广阔的应用前景。

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引用次数: 0

Performance evaluation in multi-radionuclide distribution measurement of a new SPECT system based on a thick CZT crystal 基于厚CZT晶体的新型SPECT多放射性核素分布测量系统的性能评价

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

Radiation Measurements

Pub Date : 2025-12-26 DOI: 10.1016/j.radmeas.2025.107602

Feng Tian , Changran Geng , Lijun Tang , Xiaobin Tang

Single photon emission computed tomography (SPECT) is the commonly used imaging modality in clinical nuclear medicine for disease diagnosis. However, traditional SPECT systems have several disadvantages when monitoring the distribution of radiopharmaceuticals labeled various radionuclides.

A cadmium zine telluride (CZT) SPECT system based on a 15.00 mm thick, three-dimensional (3D) pixeled CZT crystal is developed. The performance of this CZT-SPECT system in detecting the distribution of different radiopharmaceuticals are analyzed through mouse phantom experiments. The results show that for ^99mTc (141 keV), ¹⁷⁷Lu (208 keV), and ¹⁸F (511 keV), the energy resolution of the CZT-SPECT system is 2.38 %, 1.94 %, and 1.47 %, respectively. The depth of interaction (DOI) of 141 keV, 208 keV or 511 keV gamma rays emitted by different radionuclides in the CZT crystal are recorded, and the DOI ranges are approximately 2.17–5.85 mm, 2.00–9.00 mm, and 1.00–11.00 mm, respectively. Both qualitative and quantitative results indicate that the CZT-SPECT system can achieve spatial distribution detection and reconstruction, both in case of irradiation with only one and multiple radionuclides. The full width at half maximum (FWHM) of radiation source placed in each kidney reconstructed is almost less than 5.00 mm for these radionuclides.

Due to the excellent energy resolution and the large size of the 3D-CZT crystal, the CZT-SPECT system developed can effectively measure the in-vivo distribution of various diagnostic and therapeutic radiopharmaceuticals labeled with different radionuclides. The results of this study can also provide technical support for the future development of more radiopharmaceuticals.

单光子发射计算机断层扫描（SPECT）是临床核医学中常用的疾病诊断成像方式。然而，传统的SPECT系统在监测各种放射性核素标记的放射性药物分布时存在一些缺点。研制了一种基于15.00 mm厚三维像素化CZT晶体的碲化镉锌（CZT） SPECT系统。通过小鼠模拟实验，分析了该系统检测不同放射性药物分布的性能。结果表明，在99mTc （141 keV）、177Lu （208 keV）和18F （511 keV）条件下，CZT-SPECT系统的能量分辨率分别为2.38%、1.94%和1.47%。记录了不同放射性核素在CZT晶体中发射的141 keV、208 keV和511 keV伽马射线的相互作用深度（DOI）， DOI范围分别约为2.17 ~ 5.85 mm、2.00 ~ 9.00 mm和1.00 ~ 11.00 mm。定性和定量结果表明，无论是单核素辐照还是多核素辐照，CZT-SPECT系统都能实现空间分布的检测和重建。这些放射性核素在重建的每个肾脏中放置的辐射源的半最大值全宽度（FWHM）几乎小于5.00 mm。由于3D-CZT晶体具有优异的能量分辨率和较大的尺寸，所开发的CZT-SPECT系统可以有效地测量不同放射性核素标记的各种诊断和治疗放射性药物的体内分布。本研究结果也可为未来更多放射性药物的开发提供技术支持。

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引用次数: 0

Towards a fully automated instrument for the advanced characterisation of trapped-charge luminescence signals: The NAUTILUS proof-of-concept 迈向用于捕获电荷发光信号高级表征的全自动仪器：NAUTILUS概念验证

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

Radiation Measurements

Pub Date : 2025-12-22 DOI: 10.1016/j.radmeas.2025.107601

Lily Bossin , Mads L. Jensen , Georgina E. King , Eduardo G. Yukihara

A Risø TL/OSL reader and a Horiba Fluorolog-QM spectrofluorometer were coupled using an optical fibre bundle to form a novel instrument, the Next-generation AUtomated Trapped charge Induced LUminescence Spectroscopy (NAUTILUS) instrument. The combined capabilities of the two instruments forming the NAUTILUS open up the possibility to perform a large range of luminescence measurements to characterise radiation-induced luminescence signals. The NAUTILUS can carry out sequences of irradiation, preheating, annealing, and advanced luminescence measurements, such as photoluminescence (PL) or radiophotoluminescence (RPL) spectroscopy, PL at elevated temperature, optically stimulated luminescence (OSL) stimulation and emission spectroscopy, and/or bleaching across the visible spectrum. The NAUTILUS also allows for nanosecond time-resolved PL or OSL measurement using pulsed lasers or diode light sources. These measurements can be carried sequentially on up to 48 samples without the need to move the samples between instruments, thus improving both measurement reproducibility and throughput.

The aim of this contribution is to demonstrate the capabilities of the NAUTILUS using well-known dosimetric materials, such as Al

_{2}

O

_{3}

:C,Mg, Al

_{2}

O

_{3}

:C, MgB

_{4}

O

_{7}

:Ce,Li, and Ag

^{+}

-doped phosphate glass. By doing so, we demonstrate the NAUTILUS’ capability to perform in-situ irradiation, heating, and reliable advanced luminescence measurements, sequentially on up to 48 samples, with results in agreement with those reported in the literature.

使用光纤束将Risø TL/OSL读取器和Horiba fluorology - qm荧光光谱仪耦合在一起，形成了一种新型仪器，即下一代自动捕获电荷诱导发光光谱（NAUTILUS）仪器。组成NAUTILUS的两种仪器的综合能力为进行大范围的发光测量提供了可能性，以表征辐射引起的发光信号。NAUTILUS可以进行一系列的辐照、预热、退火和高级发光测量，例如光致发光（PL）或放射光致发光（RPL）光谱、高温下的PL、光激发发光（OSL）刺激和发射光谱，以及/或整个可见光谱的漂白。NAUTILUS还允许纳秒时间分辨PL或OSL测量使用脉冲激光或二极管光源。这些测量可以在多达48个样品上连续进行，而无需在仪器之间移动样品，从而提高了测量的可重复性和吞吐量。这项贡献的目的是展示NAUTILUS使用众所周知的剂量测定材料的能力，例如Al2O3:C，Mg, Al2O3:C, MgB4O7:Ce，Li和Ag+掺杂的磷酸盐玻璃。通过这样做，我们证明了NAUTILUS能够进行原位照射，加热和可靠的先进发光测量，依次对多达48个样品进行测量，结果与文献中报道的结果一致。

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引用次数: 0