Radiation Measurements最新文献

{"title":"Characterization of lithium fluoride fluorescent nuclear track detectors for linear energy transfer measurements in light-ion beams using confocal microscopy","authors":"I.D. Muñoz ,&nbsp;M. Sankowska ,&nbsp;A. Kilian ,&nbsp;O. Jäkel ,&nbsp;P. Bilski","doi":"10.1016/j.radmeas.2026.107623","DOIUrl":"10.1016/j.radmeas.2026.107623","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"192 ","pages":"Article 107623"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078831","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}

{"title":"An investigation of neutron detection based on a consumer CMOS camera with a lens cap containing a neutron conversion layer","authors":"Jiale Mao ,&nbsp;Shumin Zhou ,&nbsp;Youchun Xiao ,&nbsp;Jingquan Liu ,&nbsp;Song Feng","doi":"10.1016/j.radmeas.2026.107632","DOIUrl":"10.1016/j.radmeas.2026.107632","url":null,"abstract":"<div><div>Conventional neutron detection techniques are often limited by high costs and operational complexity. To develop a convenient and cost-effective solution, a novel neutron detection method based on a consumer CMOS camera with a lens cap containing a layer of neutron scintillator has been proposed. The performance of a consumer CMOS camera has been tested using ¹³⁷Cs gamma-rays. Neutron detection experiments have been carried out using a ²³⁸Pu-Be neutron source and the results from four different lens caps – lens cap #1 (Empty), lens cap #2 (Gd<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>), lens cap #3 (<span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF/ZnS=1:1) and lens cap #4 (<span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF/ZnS=1:2) – have been analyzed. The results demonstrate the technical feasibility of the proposed approach, while also highlighting the challenges in neutron/gamma signal discrimination.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"192 ","pages":"Article 107632"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189395","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}

{"title":"New high light yield ceramics scintillators (Gd,Y,Pr, Ce)3Al2Ga3O12 and (Gd,Y,Pr, Tb)3Al2Ga3O12","authors":"M. Korzhik ,&nbsp;V. Smyslova ,&nbsp;A. Bondarau ,&nbsp;V. Dubov ,&nbsp;E. Borisevich ,&nbsp;K. Ivanovskikh ,&nbsp;D. Lelekova ,&nbsp;P. Karpyuk ,&nbsp;I. Komendo ,&nbsp;V. Mechinsky ,&nbsp;V. Pustovarov ,&nbsp;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)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.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"192 ","pages":"Article 107604"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","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}

{"title":"Uniformity of heating across sample holders during luminescence measurements","authors":"J.A. Winzar,&nbsp;G.A.T. Duller,&nbsp;H.M. Roberts","doi":"10.1016/j.radmeas.2026.107617","DOIUrl":"10.1016/j.radmeas.2026.107617","url":null,"abstract":"<div><div>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.</div><div>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’)).</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"192 ","pages":"Article 107617"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981057","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}

{"title":"Towards a fully automated instrument for the advanced characterisation of trapped-charge luminescence signals: The NAUTILUS proof-of-concept","authors":"Lily Bossin ,&nbsp;Mads L. Jensen ,&nbsp;Georgina E. King ,&nbsp;Eduardo G. Yukihara","doi":"10.1016/j.radmeas.2025.107601","DOIUrl":"10.1016/j.radmeas.2025.107601","url":null,"abstract":"<div><div>A Risø TL/OSL reader and a Horiba Fluorolog-QM spectrofluorometer were coupled using an optical fibre bundle to form a novel instrument, the <strong>N</strong>ext-generation <strong>AU</strong>tomated <strong>T</strong>rapped charge <strong>I</strong>nduced <strong>LU</strong>minescence <strong>S</strong>pectroscopy (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.</div><div>The aim of this contribution is to demonstrate the capabilities of the NAUTILUS using well-known dosimetric materials, such as Al<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>:C,Mg, Al<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>:C, MgB<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>7</mn></mrow></msub></math></span>:Ce,Li, and Ag<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span>-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.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"191 ","pages":"Article 107601"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925106","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}

{"title":"Energy spectra from ionising radiation in the troposphere and stratosphere measured with a super-miniaturised scintillator detector","authors":"Karen L. Aplin ,&nbsp;Justin D. Tabbett ,&nbsp;Isobel M.P. Houghton","doi":"10.1016/j.radmeas.2025.107581","DOIUrl":"10.1016/j.radmeas.2025.107581","url":null,"abstract":"<div><div>Motivated by the need to measure and understand the role of energetic particles in atmospheric processes, a super-miniaturised (40 g) CsI(Tl) scintillator (“microscintillator”) coupled to a PiN photodiode has been developed and tested in the atmosphere up to an altitude of 32 km. Specifically, a microscintillator and Geiger counters were flown with a meteorological radiosonde in July 2024. Separately, a hand-held microscintillator was carried on transatlantic passenger flights in March 2025. These deployments all occurred during calm space weather conditions, meaning that particles created by the galactic cosmic ray (GCR) background could be measured within the energy range of the instrument, 0.02–10 MeV. Geiger and microscintillator count rates from the balloon were well-correlated, with maximum count rates at ∼21 km, consistent with previous work. The spectral peak was centred on 1–2 MeV with an exponential decay coefficient of ∼0.5 MeV, consistent with the background GCR gamma spectrum. Energy spectra from the balloon and passenger flight at 10–12 km were consistent, with minor differences explained by lower-energy gammas and electrons not penetrating the plane's fuselage. Spectral lines from gammas created by GCR-neutron interactions with the atmosphere were detected in airborne data and were absent from ground-based data. These technology demonstrator flights provide background reference GCR ionising radiation spectra for comparison with more disturbed space weather conditions, where additional particles would be expected. Detection of gamma rays from GCR neutrons offers a way to directly calibrate neutrons measured at Earth's surface to ionising radiation in the atmosphere.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"191 ","pages":"Article 107581"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737937","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}

{"title":"Pulsed and time-resolved optically stimulated luminescence of natural minerals – A review","authors":"Svenja Riedesel ,&nbsp;Christina Ankjærgaard","doi":"10.1016/j.radmeas.2025.107596","DOIUrl":"10.1016/j.radmeas.2025.107596","url":null,"abstract":"<div><div>Time-resolved luminescence measurements provide a powerful means of investigating luminescence processes across timescales, ranging from picoseconds to seconds. These measurements are typically enabled by pulsed stimulation, where light pulses of fixed durations are applied to a sample. Luminescence can then be recorded both during and after the pulsed light stimulation, allowing discrimination between stimulation and emission, as well as isolation of luminescence components with different lifetimes.</div><div>Quartz and feldspar minerals are the two natural minerals most commonly used in luminescence studies. Time-resolved luminescence of feldspars has been investigated since the early 1990s, while quartz time-resolved signals has come into focus since around 2000. Over the past three decades, the extensive research into time-resolved and pulsed luminescence properties of these two minerals has provided insights into the lifetime of recombination and relaxation processes of various emissions in these minerals. These differences in the luminescence decay of quartz and feldspar offers a practical solution for discriminating their luminescence.</div><div>This review is aimed at researchers specialising in the field of luminescence dating, who embark on their first pulsed and time-resolved luminescence journeys. It provides practical information on measurement techniques for conducting time-resolved luminescence measurements and presents an overview of research findings, accumulated over the past 3.5 decades highlighting both the fundamental processes revealed and the applications enabled by these methods.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"191 ","pages":"Article 107596"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790519","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}

{"title":"Use of gamma-ray spectroscopy in thickness gauging of a complex-shaped lead shield","authors":"Joseph Graham ,&nbsp;Brian Durtschi ,&nbsp;Ashish Avachat ,&nbsp;Seth Kilby","doi":"10.1016/j.radmeas.2025.107582","DOIUrl":"10.1016/j.radmeas.2025.107582","url":null,"abstract":"<div><div>Methods for measuring the thickness of lead shielding based on ⁶⁰Co gamma-ray spectroscopy are presented. In applications where a shield’s thickness is multiple mean free paths and the shield has a complex shape (i.e. cannot be approximated as a simple solid such as a slab, sphere, semi-infinite medium, etc.), the necessary buildup factors are not available. Thus, determination of shield thickness by means of the Beer–Lambert law requires separating the counts from uncollided photons from the scattered photon contribution. It is demonstrated how the 1332 keV gamma ray of ⁶⁰Co can be used to precisely quantify lead thicknesses up to at least <span><math><mo>∼</mo></math></span>280 mm. Use of the ratio of 1173 keV to 1332 keV photopeak areas to determine thickness is also discussed.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"191 ","pages":"Article 107582"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683066","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}

{"title":"Corrigendum to “Characterization of a Gd-based color CMOS detector for proton dosimetry” [Radiat. Meas. 164 (2023) 106945]","authors":"Qi Liu ,&nbsp;Benno Rohrer ,&nbsp;Sairos Safai ,&nbsp;Antony John Lomax ,&nbsp;Zhiling Chen ,&nbsp;Michele Togno","doi":"10.1016/j.radmeas.2025.107595","DOIUrl":"10.1016/j.radmeas.2025.107595","url":null,"abstract":"","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"191 ","pages":"Article 107595"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973278","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}

{"title":"Optical and scintillation properties of Tb-doped NaGd(WO4)2 single crystals","authors":"Kodai Makino ,&nbsp;Hiromi Kimura ,&nbsp;Daiki Shiratori ,&nbsp;Kensei Ichiba ,&nbsp;Kenichi Watanabe ,&nbsp;Takeshi Fujiwara ,&nbsp;Takayuki Yanagida ,&nbsp;Yutaka Fukuchi ,&nbsp;Hidetoshi Kato","doi":"10.1016/j.radmeas.2026.107605","DOIUrl":"10.1016/j.radmeas.2026.107605","url":null,"abstract":"<div><div>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 4<em>f</em>–4<em>f</em> transitions of Tb³⁺. The measured scintillation decay times (1.0–1.6 ms) were consistent with those typically observed for the 4<em>f</em>–4<em>f</em> 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.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"191 ","pages":"Article 107605"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925105","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}