Journal of Radioanalytical and Nuclear Chemistry最新文献

{"title":"The 100Mo(p,2n)99mTc reaction: production analysis and clinical yield","authors":"E. Yıldız","doi":"10.1007/s10967-026-11041-5","DOIUrl":"10.1007/s10967-026-11041-5","url":null,"abstract":"<div><p>The global supply crises associated with the ^99mTc isotope, which constitutes one of the most widely used radionuclides in nuclear medicine diagnostic procedures, have significantly increased the need for alternative and sustainable production routes. Since conventional ^99mTc production largely depends on aging nuclear reactors and the fission of highly enriched uranium targets, interruptions in reactor operation, transportation limitations, and geopolitical factors have led to periodic shortages worldwide. These challenges have accelerated interest in accelerator-based production techniques, particularly direct cyclotron production methods, as a reliable and decentralized alternative for medical isotope generation. In this study, the direct production of ^99mTc through the ¹⁰⁰Mo(p,2n)^99mTc reaction was investigated using theoretical nuclear reaction calculations together with available experimental data. The reaction mechanism was analyzed over a wide proton energy range relevant to hospital-type and medium-energy medical cyclotrons. The calculated reaction cross-sections and astrophysical S-factor values were systematically evaluated and compared with experimental datasets obtained from the international EXFOR nuclear reaction database. These comparisons enabled the assessment of the predictive performance of the theoretical models and the determination of the most efficient energy intervals for isotope production. The graphical analyses obtained within the scope of the study reveal the proton energy regions where the production yield of ^99mTc reaches its maximum while minimizing unwanted by-product formation. In particular, the results demonstrate that optimized irradiation conditions can significantly enhance radionuclide purity and production efficiency, which are critical parameters for routine clinical applications. Furthermore, the study highlights the technological and economic potential of existing medical cyclotrons to contribute to regional or local ^99mTc supply chains without relying exclusively on reactor-based production systems. The findings of this work provide valuable insight into the optimization of accelerator-based radioisotope production and support ongoing efforts toward establishing more sustainable, flexible, and clinically accessible ^99mTc production infrastructures for modern nuclear medicine applications.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5459 - 5465"},"PeriodicalIF":1.7,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermoluminescence characteristics of Eu2O3 phosphor exposed to thermal neutrons","authors":"Mahesh S. Bhadane,&nbsp;Kishor H. Gavhane,&nbsp;Preeti Padhye Kulkarni,&nbsp;S. S. Dahiwale,&nbsp;S. D. Dhole","doi":"10.1007/s10967-026-11038-0","DOIUrl":"10.1007/s10967-026-11038-0","url":null,"abstract":"<div><p>In the present work, low-temperature-treated pure europium oxide (Eu₂O₃) was used as a phosphor and investigated for under moderated ²⁵²Cf thermal neutron irradiation conditions for thermoluminescence dosimetric applications. A moderated ²⁵²Cf spontaneous-fission neutron source providing a thermal neutron flux of  ~ 10⁶ n cm⁻² s⁻¹ was used for irradiation of Eu₂O₃ phosphors. All the thermal neutron fluences were measured ex-situ based on the irradiation time. For structural confirmation, the phosphors were characterized using X-ray diffraction (XRD). The XRD results revealed a cubic crystal structure, and a decrease in the intensity of characteristic diffraction peaks was observed with increasing neutron fluence, indicating irradiation-induced structural modifications. Moreover, the thermal neutron dosimetric characteristics of the present phosphor, including the thermoluminescence (TL) glow curve, TL dose–response, and fading behavior, were systematically invistigated. The phosphor exhibited a prominent TL glow peak around 303 °C, corresponding to a a deeper level dosimetric trap. The TL response of the Eu₂O₃ phosphor as a function of moderated thermal neutron fluence was found to be linear up to a fluence of 1.55 × 10¹¹ n cm⁻², followed by saturation at higher fluence levels. In addition, the TL glow curves were analyzed using glow curve deconvolution (GCD), and the associated trapping parameters were determined. The deconvolution suggested the presence of multiple trapping levels contributing to the observed TL response. Gamma-ray spectroscopic measurements confirmed europium activation through the ¹⁵¹Eu(n,γ)^152m1,^m2Eu reaction, supporting the thermal-neutron-mediated TL mechanism in Eu₂O₃. However, the contribution of activation gamma rays and residual gamma background indicates that the measured TL response should be interpreted within the context of a moderated neutron–gamma mixed radiation field. The negligible fading (~ 1.7% over three months) and linear fluence response demonstrate the potential applicability of Eu₂O₃ for thermal neutron dosimetric studies under moderated irradiation conditions.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5421 - 5430"},"PeriodicalIF":1.7,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a hot cell-integrated ICP-OES for direct analysis of high-level liquid waste","authors":"Han Yang,&nbsp;Zhiheng Wang,&nbsp;Xiaofeng Xia,&nbsp;Yufei Zhao,&nbsp;Quanwei Liu,&nbsp;Zhaoqing Zhang,&nbsp;Li Li,&nbsp;Xiuli Zhang","doi":"10.1007/s10967-026-11035-3","DOIUrl":"10.1007/s10967-026-11035-3","url":null,"abstract":"<div><p>This study presents a hot cell-integrated inductively coupled plasma optical emission spectrometry (ICP-OES) instrument designed for the direct analysis of high-level liquid waste(HLLW). To overcome the constraints of conventional ICP-OES in high-radiation environments, the system physically separates the plasma generation and sample introduction modules within a hot cell from the radiation-sensitive radio-frequency power supply and optical detection system located externally. A frequency-tunable resonant power supply addresses impedance mismatch from the lengthened load coil, while a folded-path relay optics channel ensures precise long-distance light transmission. The system enables direct multi-element analysis of HLLW without requiring separation of highly radioactive nuclides, offering a robust approach to support vitrification process research.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5431 - 5441"},"PeriodicalIF":1.7,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of plutonium budget in August-one glacier of the Qilian Mountains, northeastern Tibetan Plateau","authors":"Mayu Liu,&nbsp;Liguo Cao,&nbsp;Yijia Gao,&nbsp;Zhengchao Zhou,&nbsp;Ning Wang,&nbsp;Peihong Shi","doi":"10.1007/s10967-026-10975-0","DOIUrl":"10.1007/s10967-026-10975-0","url":null,"abstract":"<div><p>Under ongoing global warming, plutonium (Pu) stored in glaciers may be remobilized and released into downstream environments. However, the distribution patterns and mass balance of Pu in arid alpine glaciers of northwestern China remain poorly constrained. We present the first quantitative assessment of Pu budgets at the August-one ice cap located in the northeastern Qilian Mountains. Wet deposition was reconstructed using continuous Pu records from Tokyo in combination with regional precipitation data. The cumulative wet deposition of ^239+240Pu at the August-one ice cap was estimated at (13 ± 1) Bq/m², The inventory corresponds to a total atmospheric input of approximately (3.1 ± 0.2) × 10⁷ Bq when scaled to the glacier area. Using three empirical area–volume scaling formulas, glacier volume loss between 1980 and 2023 was further reconstructed, and combined with measured Pu isotope concentrations in summer meltwater, the cumulative outflow was estimated at (1.3 ± 0.2) × 10⁶ Bq, nearly an order of magnitude lower than the inferred atmospheric input. These results demonstrate that, despite pronounced glacier shrinkage over the past four decades, the August-one ice cap has acted as a persistent sink for Pu isotopes rather than a secondary source to downstream ecosystems. This study provides new insights into the environmental fate of Pu in cryospheric systems under ongoing climate change.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 7","pages":"4729 - 4739"},"PeriodicalIF":1.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A simple luminescence method for uranyl estimation in water via co-precipitation with 3,5-pyridinedicarboxylic acid-Cd2+ complex","authors":"S. Maji,&nbsp;Satendra Kumar,&nbsp;Raj Kishore Das,&nbsp;K. Sundararajan","doi":"10.1007/s10967-026-11027-3","DOIUrl":"10.1007/s10967-026-11027-3","url":null,"abstract":"<div><p>A simple method has been developed for the sensitive detection of uranyl ion (UO₂²⁺) in water using time gated luminescence with pulsed lamp as excitation source. UO₂²⁺ ions show remarkable luminescence when it is present with Cd²⁺− 3,5-pyridinedicarboxylic acid complex which is water insoluble. Luminescence of UO₂²⁺ ions is further resolved with enhanced lifetime when the complex is prepared in a mixture of acetonitrile and water. The luminescence intensity shows a linear response with concentration over 0.5–25 ng mL⁻¹ of UO₂²⁺ ions. Detection limit of 0.15 ng mL⁻¹ (6.3 × 10^–10 M) is achieved with a relative standard deviation (RSD) 9% (n = 6). The present method has been successfully applied for sensing of UO₂²⁺ ions in normal water as well as in sea water without pre-concentration. This study demonstrates a very quick and sensitive method for the detection of UO₂²⁺ ions in aqueous environment.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5145 - 5154"},"PeriodicalIF":1.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study of ruthenium transport from boiling nitric solution of high-level liquid waste with stainless steel tube","authors":"Marie-Noelle Ohnet,&nbsp;Charlotte Moulin,&nbsp;Cédric Gomez,&nbsp;Naoki Yoshida","doi":"10.1007/s10967-026-10991-0","DOIUrl":"10.1007/s10967-026-10991-0","url":null,"abstract":"<div><p>In the context of a total loss of cooling in fission product storage tanks at spent nuclear fuel reprocessing facilities, the experimental work conducted aims to enhance the understanding of ruthenium transport mechanisms from concentrated nitric acid solutions under accidental conditions, particularly during thermal runaway events. Experiments were carried out using two distinct ruthenium sources (volatile RuO₄ or gaseous Ru coming from nitrosyl ruthenium - HNO₃ solution) to investigate the transport of gaseous ruthenium species through a controlled thermal tube made of either quartz or stainless steel. The SS tube is representative of the venting pipes and the Ru nitrosyl-HNO₃ source simulating HLLW. The influence of several parameters, including carrier gas composition (air, H₂O), NO₂ feed, tube temperature, geometry and material was systematically examined. Results indicate that the key factors governing ruthenium transport at the tube outlet are the presence of NO₂ or nitric vapors and the tube temperature. The gas phase composition affected Ru transport which is more enhanced with HNO₃ vapors than with NO₂. With SS tube at 150 °C and Ru nitrosyl-HNO₃ source at 140 °C, up to 95% was transported at the outlet predominantly in the gaseous form attributed to RuO₄. At lower temperatures, deposition and condensation phenomena were favored, even in the presence of nitric vapors.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5087 - 5103"},"PeriodicalIF":1.7,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evapotranspiration rates from measured meteorological parameters and quantification of tritium flux at the Kaiga site","authors":"T. K. Reji,&nbsp;M. S. Vishnu,&nbsp;Sanyam Jain,&nbsp;R. M. Joshi,&nbsp;I. V. Saradhi,&nbsp;Vandana Pulhani,&nbsp;N. Karunakara","doi":"10.1007/s10967-026-11022-8","DOIUrl":"10.1007/s10967-026-11022-8","url":null,"abstract":"<div><p>The evapotranspiration (ET) rate at the Kaiga Nuclear Power Plant (NPP) site, India, was calculated for the year 2023 using four empirical methods: the FAO-56 Penman–Monteith theory, Turc, Makkink, and Priestley–Taylor equations. The resulting annual average ET rates were estimated as 1.45 mm d⁻¹, 1.89 mm d⁻¹, 3.2 mm d⁻¹, and 4.38 mm d⁻¹ respectively. Tritium released to the atmosphere via the NPP stack mixes with ambient air moisture and subsequently exchanges with water reservoirs in soil and vegetation. The tritium evapotranspiration flux was computed by combining the modeled ET rates with the atmospheric tritium activity concentration. Across the four models, the annual average tritium evapotranspiration flux in the vicinity of the Kaiga NPP during 2023 ranged from 0.32 to 0.94 mBq m⁻² s⁻¹. This study successfully generated crucial site-specific ET and tritium flux data, which are necessary input parameters for models predicting the environmental transfer and distribution of tritium.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5307 - 5321"},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-resolution continuous monitoring of indoor radon in public multi-use facilities: operational drivers and implications for radon exposure assessment","authors":"Joon-sig Jung,&nbsp;Hyung-jin Jeon,&nbsp;So-young Lee,&nbsp;Min-jeong Ko,&nbsp;Jong-hee Jang,&nbsp;Min-kyeong Kim,&nbsp;Jaeseok Heo,&nbsp;Duckshin Park","doi":"10.1007/s10967-026-11028-2","DOIUrl":"10.1007/s10967-026-11028-2","url":null,"abstract":"<div><p>Indoor radon variability associated with building operation was evaluated in 20 public multi-use facilities using continuous monitoring. Radon concentrations were significantly higher during weekends and non-operational periods, with WHO guideline exceedance rates increasing by up to two- to threefold. Although effective air change rates were generally low, their association with radon concentrations was weak, indicating that ventilation performance alone could not fully explain the observed variability. Radon accumulation appeared to be more strongly influenced by the duration of ventilation shutdown than by air exchange. These findings support continuous radon monitoring for exposure assessment, radiation protection, and radioactivity surveillance in public facilities.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5135 - 5143"},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of oxime functionalized beta ketoenamine COFs for effective uranium adsorption in wastewater","authors":"Abdullah,&nbsp;Jinfeng Li,&nbsp;Fuqiu Ma","doi":"10.1007/s10967-026-11026-4","DOIUrl":"10.1007/s10967-026-11026-4","url":null,"abstract":"<div><p>Herein, a β-ketoenamine-based covalent organic framework (COF-HSO₃) was first synthesized by gamma irradiation method and then modified by ammoniation and oximation. After extensive characterization, COF-NH₄SO₃ and COF-NH₄SO₃-OM were utilized in the adsorption of uranium from uranium-bearing wastewater. In batch experiments, equilibrium was reached in 20 min for COF-NH₄SO₃-OM, showing the highest adsorption capacity (<i>Q</i>_e = 709 mg/g) and percent removal (91%) at pH = 5 with high selectivity and distribution coefficient. The mechanism of adsorption was chemisorption, monolayer, endothermic, and spontaneous. This work is a significant contribution to the oximation of beta- ketoenamine COFs for the adsorption of uranium from wastewater. Kindly provide given name for the author Abdullah. Thanks for the query. The author's name is Abdullah. There is no given name for this author.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5247 - 5261"},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Software-based data processing methods for uranium isotope measurements by a self-developed multi-collector mass spectrometry","authors":"Yurong Li,&nbsp;Jing Wu,&nbsp;Zhiqiang Wang,&nbsp;Li Li,&nbsp;Yufei Zhao,&nbsp;Yongquan Qin,&nbsp;Yantao Hu,&nbsp;Jing Ma,&nbsp;Quanwei Liu","doi":"10.1007/s10967-026-11037-1","DOIUrl":"10.1007/s10967-026-11037-1","url":null,"abstract":"<div><p>Multi-collector thermal ionization mass spectrometry (TIMS) is widely used for high-precision uranium isotope ratio measurements in nuclear material analysis. In this work, a self-built TIMS system (TIMS-II) and its dedicated measurement software were developed with emphasis on software-oriented data processing and correction methods. Established correction strategies, including peak center identification, software-controlled background evaluation, mass-dependent fractionation correction, and inter-Faraday cup efficiency correction were implemented and integrated into a unified measurement workflow. The performance of the developed system and software was evaluated through uranium isotope measurements using natural uranium and the CRM U500 standard solution. For the corrected ²³⁵U/²³⁸U isotope ratio of CRM U500, a relative standard deviation (RSD) of 0.00156% was achieved. The achieved measurement precision is comparable to performance levels reported for commercial TIMS systems in published studies. The results indicate that the proposed software-based data processing framework provides a practical and reliable approach for uranium isotope analysis using self-built TIMS systems.</p></div>","PeriodicalId":661,"journal":{"name":"Journal of Radioanalytical and Nuclear Chemistry","volume":"335 8","pages":"5411 - 5419"},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}