Radiation Measurements最新文献

{"title":"Experimental investigation of a heatless approach for initializing radiophotoluminescence glasses (FD-7) using ultraviolet light","authors":"Soheil Aghabaklooei ,&nbsp;Hiroshi Yasuda","doi":"10.1016/j.radmeas.2025.107525","DOIUrl":"10.1016/j.radmeas.2025.107525","url":null,"abstract":"<div><div>Ag-doped phosphate radiophotoluminescence (RPL) glass dosimeter (RPLD) is widely used for radiation dosimetry. Although RPLD has the advantage of reusability through proper annealing, the current annealing process has undesirable features, such as heating at a high temperature (approximately 400 °C) and subsequent long (nearly half a day) cooling. In this study, we propose a new approach to initialize RPLDs more safely and rapidly using ultraviolet light (UV), which is expected to be preferable in many occasions, including quality assurance (QA) for radiotherapy. Four samples of commercially available RPLD glass (FD-7) with a size of φ1.5 mm × 12 mm were irradiated with X-rays (160 kV, 6.3 mA) at 0.1, 0.5, 1, 2, and 5 Gy (for H₂O) and exposed to UV from a high-pressure mercury UV lamp, which has a broad wavelength range with a dominant peak at 365 nm. RPL intensities were measured using an exclusive RPL readout system (FDG-1000, Asahi Techno Glass Co., Ltd.) at certain time intervals at room temperature. After 3-h UV exposure, the RPL intensity decreased by &gt;90 % for irradiation of 1 Gy or higher, and 6-h UV exposure cleared &gt;95 % of the RPL intensity for 2 Gy or higher. The RPL intensity increased slightly (2 % in 24 h at room temperature) after the termination of UV exposure. According to these findings, it is expected that the proposed heatless approach to initialize RPLDs, named ‘UV-annealing method’ here, will be effectively applied to routine dosimetry in relatively high-dose radiation fields, including radiotherapy facilities.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107525"},"PeriodicalIF":2.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047642","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":"Distributed IoT-based radon monitoring in indoor spaces: Quantifying spatial gradients using multi-node Si-PIN arrays","authors":"Chao Xie ,&nbsp;Chunyun Jiang ,&nbsp;Tao Qiu ,&nbsp;Xiaodong Wang ,&nbsp;Guoqiang Zeng ,&nbsp;Shengyang Feng","doi":"10.1016/j.radmeas.2025.107524","DOIUrl":"10.1016/j.radmeas.2025.107524","url":null,"abstract":"<div><div>Indoor radon gas exposure is a major source of ionizing radiation for the public, and its spatial distribution is highly heterogeneous. However, traditional single-point monitoring devices struggle to capture gradient changes, and high costs restrict large-scale deployment. This study developed an Internet of Things (IoT)-based Distributed Radon Monitoring System (DRMS) to achieve high-resolution spatial monitoring by integrating low-cost silicon-based (Si-PIN) sensor arrays with adaptive anti-jamming Zigbee networks. The system employs multiple radon concentration sensors to enhance sensitivity and constructs a star-cluster hybrid topology wireless network, ensuring reliable communication in complex environments (1000 m in line-of-sight and 300 m in non-line-of-sight). Experimental validation shows that DRMS demonstrates good temporal consistency with the standard radon detector RAD7 (Durridge Company Inc., USA) within the dynamic range of 100–300 Bq.m⁻³. It can capture spatial gradients of radon concentration up to 4.27 times in enclosed spaces (e.g., median value of 228.5 Bq.m⁻³ in corner areas vs. 53.5 Bq.m⁻³ in near-window areas), which matches the results of computational fluid dynamics (CFD) simulations (R² = 0.962). The system provides a cost-effective and precise tool for radon risk assessment in complex environments such as mines and basements, holding significant value for achieving precise prevention and control of radon exposure risks and public health protection.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107524"},"PeriodicalIF":2.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057436","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":"The performance of a planar CdZnTe thermal neutron detector","authors":"Yu Xiang ,&nbsp;Xiaopan Jiang ,&nbsp;Bin Tang ,&nbsp;Xu Chen ,&nbsp;Xiaoxuan Li ,&nbsp;Xianchao Huang ,&nbsp;Zhiming Zhang ,&nbsp;Cunfeng Wei ,&nbsp;Long Wei","doi":"10.1016/j.radmeas.2025.107514","DOIUrl":"10.1016/j.radmeas.2025.107514","url":null,"abstract":"<div><div>The nuclide ¹¹³Cd is sensitive to thermal neutrons. Most of the gamma rays generated from ¹¹³Cd<span><math><mrow><msup><mrow><mrow><mo>(</mo><mi>n</mi><mo>,</mo><mi>γ</mi><mo>)</mo></mrow></mrow><mrow><mn>114</mn></mrow></msup><mi>Cd</mi></mrow></math></span> reactions have an energy of 558 keV. CdZnTe detectors contain Cd-113. Their good energy resolution for gamma rays ensures that they can identify the thermal neutrons by detecting the prompt gamma rays. Planar CdZnTe detectors are easy to manufacture and therefore cheap. Nonetheless, they have not yet been utilized in thermal neutron detection since their spectra lack the 558 keV photopeak, which is essential for identifying neutron capture events. In this paper, a 22 mm<span><math><mo>×</mo></math></span>22 mm<span><math><mo>×</mo></math></span>0.5 mm planar CdZnTe detector was used to detect the thermal neutrons from the No. 20 neutron beam line of China Spallation Neutron Source. A special detection method was applied to distinguish thermal neutrons from background radiation so that the planar detector was able to detect thermal neutrons. The intrinsic total detection efficiency of the detector for thermal neutrons was measured as 6.58%<span><math><mo>±</mo></math></span>0.76%. The result demonstrates that planar CdZnTe detectors are also able to serve as thermal neutron detectors.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107514"},"PeriodicalIF":2.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018418","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":"Development and response characterization of new Bonner sphere spectrometer using lithium-glass scintillators coupled with current-integrating photomultiplier tubes","authors":"Akihiko Masuda ,&nbsp;Tetsuro Matsumoto ,&nbsp;Seiya Manabe ,&nbsp;Hideki Harano ,&nbsp;Hiroki Tanaka ,&nbsp;Yoshinori Sakurai ,&nbsp;Daisuke Ito ,&nbsp;Takushi Takata ,&nbsp;Hiroaki Kumada","doi":"10.1016/j.radmeas.2025.107512","DOIUrl":"10.1016/j.radmeas.2025.107512","url":null,"abstract":"<div><div>A new Bonner sphere spectrometer (BSS) has been developed to measure the spectral fluence of high-intensity neutrons in boron neutron capture therapy facilities and radiation resistance test facilities for electronic devices. A pair of lithium-glass scintillators (GS20 and GS30) coupled with current-integrating photomultiplier tubes was adopted as a low-energy neutron detection element for the Bonner sphere detectors to compensate for the effects of γ-rays. The response matrix for the BSS was determined by Monte Carlo simulations of the response in pulse-counting mode and by using an experimentally determined conversion factor to convert the pulse-counting response to the current-integrating response. Since the new detector has geometric asymmetry, the directional dependence of the response functions was evaluated through experiments and Monte Carlo simulations. A significant directional dependence was observed, which is acceptable when neutrons from a single direction, but care must be taken when measuring neutrons originating from a wide range of directions.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107512"},"PeriodicalIF":2.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020743","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":"Development of a Ce:GPS scintillator-based spectrometer and its demonstration in radioactive cesium contamination sites","authors":"Yuki Morishita ,&nbsp;Shigeo Nakama ,&nbsp;Kotaro Ochi ,&nbsp;Yoshimi Urabe ,&nbsp;Marina Kanno","doi":"10.1016/j.radmeas.2025.107513","DOIUrl":"10.1016/j.radmeas.2025.107513","url":null,"abstract":"<div><div>Following the Fukushima Daiichi Nuclear Power Plant accident, radioactive cesium contamination posed a significant environmental concern. This study developed a compact gamma-ray spectrometer utilizing a Gd₂Si₂O₇:Ce (Ce:GPS) scintillator and a compact photomultiplier tube (PMT) for environmental monitoring. The spectrometer was designed to overcome the limitations of traditional NaI(Tl) detectors, leveraging the non-hygroscopic nature and high energy resolution of Ce:GPS scintillators. Performance was evaluated through measurements of a¹³⁷Cs source and a comparison with a commercial NaI(Tl) survey meter. The spectrometer's potential for effective and portable monitoring of radioactive cesium in contaminated environments was demonstrated. The system was tested using sealed sources, confirming its ability to detect the 662 keV photopeak of ¹³⁷Cs with high accuracy. The energy resolution of this photopeak was 10.8 % FWHM. Field measurements in radiocesium-contaminated areas showed the spectrometer's effectiveness in detecting dose rate variations and high-dose hotspots. This portable, durable spectrometer shows promise for applications in environmental radiation monitoring and remote sensing technologies.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"189 ","pages":"Article 107513"},"PeriodicalIF":2.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026332","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":"Combined detection method of LET measurement using CR-39 and TLD in carbon ion radiotherapy","authors":"Zhou Yuan ,&nbsp;Weihai Zhuo ,&nbsp;Zhiyuan Yang ,&nbsp;Jingfang Zhao ,&nbsp;Bo Chen","doi":"10.1016/j.radmeas.2025.107511","DOIUrl":"10.1016/j.radmeas.2025.107511","url":null,"abstract":"<div><div>The measurement of linear energy transfer (LET) distribution in carbon ion therapeutic fields is essential for optimizing beam quality control and enhancing therapeutic outcomes. To address the need for precise LET measurements, this study introduces a novel combined detector integrating CR-39 and thermoluminescent dosimeters (TLDs). Capitalizing on the respective strengths of each detector, a new method was developed to estimate LET spectra. Validation experiments and applications in both water and lung phantoms demonstrated that the combined detector significantly enhanced measurement accuracy compared to the use of either detector individually. The relative deviation in LET_d measurements was controlled within 15 %. These findings suggest that the integrated detector system is highly effective for LET distribution measurements in carbon ion therapy and holds substantial potential for clinical applications.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107511"},"PeriodicalIF":2.2,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902735","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":"Weighing options for passive environmental neutron dosimetry: A comparative study of PADCs, TLDs, OSLDs, and fission track detectors","authors":"Lily Bossin,&nbsp;Jeppe Brage Christensen,&nbsp;Federico Alejandro Geser,&nbsp;Malgorzata Kasprzak,&nbsp;Sabine Mayer,&nbsp;Malgorzata Sliz,&nbsp;Alberto Stabilini,&nbsp;Eduardo Gardenali Yukihara","doi":"10.1016/j.radmeas.2025.107504","DOIUrl":"10.1016/j.radmeas.2025.107504","url":null,"abstract":"<div><div>This study aims to evaluate the potential of polyallyl diglycol carbonate (PADC) detectors, coupled with <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF converters, for passive environmental neutron dosimetry. Their performance is compared against three other methods, fission track detectors, thermoluminescent detectors (TLDs), and optically stimulated luminescence detectors (OSLDs), to determine their viability for passive routine neutron monitoring in environmental settings.</div><div>The four detector types investigated (PADCs, fission tracks, TLDs and OSLDs) were placed in a moderator sphere and exposed to an AmBe neutron field. The measurements evaluated the dose response, measurement range, and precision of each system.</div><div>Results confirm that the advantage of the track detectors (PADC or fission track) is their gamma insensitivity: the TLD and OSLD methods require the combination of neutron-sensitive with neutron-insensitive detectors, as both are gamma-sensitive. This translated into a detection limit <span><math><mrow><msup><mrow><mi>H</mi></mrow><mrow><mo>∗</mo></mrow></msup><mrow><mo>(</mo><mn>10</mn><mo>)</mo></mrow></mrow></math></span>=6<!--> <!-->μ<!--> <!-->Sv for PADC detectors coupled with <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF converters, comparable to that of fission track detectors (3<!--> <!-->μ<!--> <!-->Sv). In contrast, the gamma-sensitive luminescence systems showed a detection limit of 10<!--> <!-->μ<!--> <!-->Sv for the TLDs and 180<!--> <!-->μ<!--> <!-->Sv for the OSLDs under AmBe neutron irradiations. This worsens under simulated environmental conditions, where a significant gamma contribution is expected, as demonstrated by a test where mixed gamma/neutron irradiation was used.</div><div>These results indicate the potential of the PADC coupled with a <span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>LiF converter system as a robust alternative to fission track detectors for passive environmental neutron dosimetry.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107504"},"PeriodicalIF":2.2,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903300","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":"Perovskite scintillators for X-ray detection and imaging","authors":"Yongqi Huang,&nbsp;Yang (Michael) Yang","doi":"10.1016/j.radmeas.2025.107497","DOIUrl":"10.1016/j.radmeas.2025.107497","url":null,"abstract":"<div><div>Perovskite scintillators have emerged as one class of competitive scintillators for next-generation X-ray detection and imaging due to their unique properties, including high atomic number (Z), superior radiation absorption capability, high photoluminescence quantum yield (PLQY), ultrafast response time, excellent spatial resolution, and low-cost fabrication. The tunable structure and versatile chemical compositions of perovskite scintillators provide distinguishable advantages over traditional inorganic scintillators for optimizing scintillation performance. This review briefly outlines the historical development of scintillators and categorizes perovskite-based scintillators based on their structural characteristics, introducing key performance parameters and evaluation criteria. Recent progress is then summarized in three major application domains: high-resolution X-ray imaging, ultrafast dynamic imaging, and multi-energy spectral imaging. The discussion highlights representative achievements and technical challenges associated with light yield, temporal response, and image resolution. Finally, current research bottlenecks, such as poor environmental stability, fabrication complexity, and system integration issues, are examined, and potential strategies for future development are proposed, including material optimization, structural engineering, and interdisciplinary system-level integration. This review aims to provide a comprehensive understanding of perovskite scintillators and promote their practical implementation in advanced radiation detection technologies.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107497"},"PeriodicalIF":2.2,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860345","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":"Comparison of liquid radioactive waste characteristics using CeBr3, LaBr3(Ce), and NaI(Tl) scintillators for on-site applications","authors":"Jaehyun Park ,&nbsp;Gyohyeok Song ,&nbsp;Wonku Kim ,&nbsp;Yeon Kyoung Choi ,&nbsp;Ki-baek Shin ,&nbsp;Gyuseong Cho","doi":"10.1016/j.radmeas.2025.107503","DOIUrl":"10.1016/j.radmeas.2025.107503","url":null,"abstract":"<div><div>The identification and quantification of gamma-emitting radionuclides in liquid radioactive waste are crucial for regulatory compliance and environmental safety. This study compares the detection performance of NaI(Tl), LaBr₃(Ce), and CeBr₃ scintillators-based detectors under identical conditions to determine their suitability for on-site gamma spectroscopy. The Minimum Detectable Activity (MDA) and activity measurement accuracy were assessed using liquid radioactive waste samples containing ¹³⁷Cs and ⁶⁰Co, with results benchmarked against High Purity Germanium (HPGe) detector measurements. LaBr₃(Ce) exhibited superior energy resolution and the lowest MDA, making it an ideal choice for detecting low-activity samples. However, its intrinsic background radiation could affect measurement uncertainties. CeBr₃ demonstrated lower intrinsic background radiation and stable detection performance, providing a balance between sensitivity and accuracy. In contrast, NaI(Tl) exhibited the highest MDA and the poorest energy resolution, limiting its suitability for precise radioisotope identification. The analysis highlights the significance of energy resolution and intrinsic background radiation in scintillator selection for on-site applications and provides essential reference data for optimizing real-time monitoring of liquid radioactive waste.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107503"},"PeriodicalIF":2.2,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144852414","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":"Development of a phoswich detector for low-energy gamma rays emitted from alpha emitters","authors":"Yuki Morishita ,&nbsp;Tsutomu Yamada ,&nbsp;Takamasa Nakasone ,&nbsp;Marina Kanno ,&nbsp;Miyuki Sasaki ,&nbsp;Yukihisa Sanada ,&nbsp;Tatsuo Torii","doi":"10.1016/j.radmeas.2025.107502","DOIUrl":"10.1016/j.radmeas.2025.107502","url":null,"abstract":"<div><div>The decommissioning of the Fukushima Daiichi Nuclear Power Station requires thorough inspection of piping for contamination, including alpha nuclides. Since external alpha particle measurements are impractical, detection relies on gamma-rays emitted by the alpha nuclides. Therefore, a phoswich detector for detecting low-energy gamma-rays was developed and experimentally validated. The detector was designed with consideration of energy deposition characteristics and consists of YAP:Ce or High Energy Resolution Gd₃(Ga,Al)₅O₁₂(Ce) (HR-GAGG) scintillators in combination with BGO scintillators, employing a photomultiplier tube for signal amplification. Validation procedures included Monte Carlo simulations and measurements using actual radiation sources. Both measurement and simulation results demonstrate a correlation in scintillator energy depositions across different gamma-ray energies. Pulse Shape Discrimination (PSD) plots effectively differentiate between low-energy and high-energy gamma-rays, thereby confirming the predictions from simulations. The combination of YAP:Ce and BGO with a digitizer enables detection of low energy gamma-rays and high energy gamma-rays. With the 0.5 mm thick YAP:Ce scintillator, the energy resolution was 29.1 % FWHM at 59.5 keV. Figure of Merit (FOM) was evaluated as 1.97. The detection efficiency for 60 keV gamma-rays was about 14 %. These results suggest promising potential for developing a sensitive low-energy gamma-ray detector utilizing various scintillator combinations. The phoswich detector shows promise for effectively detecting low-energy gamma-rays emitted by alpha nuclides in piping.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"188 ","pages":"Article 107502"},"PeriodicalIF":2.2,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841105","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}