Radiation Physics and Chemistry最新文献

{"title":"Comparative Gamma-Ray and Fast-Neutron Shielding Assessment of Natural Mineral-Ore Pellets","authors":"Nergiz Yıldız Yorgun, Esra Kavaz Perişanoğlu","doi":"10.1016/j.radphyschem.2026.114573","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114573","url":null,"abstract":"In this study, the radiation shielding properties of compacted pellets prepared from tourmaline, ilmenite, witherite ore, antimony ore, and bismuth ore were investigated. The elemental compositions of the samples were determined by SEM–EDX and used in the theoretical EpiXS shielding calculations. Gamma-ray attenuation measurements were performed using a <ce:sup loc=\"pre\">133</ce:sup>Ba source over the energy range of 81–383 keV. Both linear and mass attenuation coefficients were evaluated to distinguish the effects of elemental composition and density. The linear attenuation coefficient of bismuth ore decreased from 20.30 ± 1.32 cm<ce:sup loc=\"post\">-1</ce:sup> at 81 keV to 2.20 ± 0.14 cm<ce:sup loc=\"post\">-1</ce:sup> at 383 keV, while that of witherite ore decreased from 13.23 ± 0.04 cm<ce:sup loc=\"post\">-1</ce:sup> to 0.59 ± 0.02 cm<ce:sup loc=\"post\">-1</ce:sup>. The half-value layer increased with photon energy for all samples, with bismuth ore exhibiting the lowest values of 0.03–0.32 cm and tourmaline the highest values of 1.11–2.24 cm. The effective atomic number generally decreased with increasing energy, while the buildup factors showed a strong dependence on photon energy and penetration depth. The theoretically calculated fast-neutron removal cross-section was highest for bismuth ore (0.16232 cm<ce:sup loc=\"post\">-1</ce:sup>), followed by ilmenite (0.14241 cm<ce:sup loc=\"post\">-1</ce:sup>), tourmaline (0.11275 cm<ce:sup loc=\"post\">-1</ce:sup>), witherite ore (0.10054 cm<ce:sup loc=\"post\">-1</ce:sup>), and antimony ore (0.09463 cm<ce:sup loc=\"post\">-1</ce:sup>). Among the investigated materials and under the studied conditions, bismuth ore exhibited the highest gamma-ray shielding performance, whereas neutron shielding followed a different material-dependent trend. The novelty of this study lies in the direct comparison of compacted natural mineral-ore pellets under identical preparation and measurement conditions, without dilution in a secondary composite matrix.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"7 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149290778","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":"Composition, structure and photon attenuation properties of late Roman archaeological glasses from Salkaya","authors":"Berna Kavaz Kındığılı, Kayhan Murat, Esra Kavaz Perişanoğlu","doi":"10.1016/j.radphyschem.2026.114572","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114572","url":null,"abstract":"In this study, Late Roman archaeological glass fragments recovered from the Salkaya site in eastern Anatolia were investigated in terms of their compositional, structural, and photon attenuation characteristics. The samples were characterized by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM–EDX) and X-ray diffraction (XRD) analyses, while gamma-ray attenuation parameters were evaluated experimentally and theoretically. EDX results showed that the glasses are mainly composed of O and Si, confirming their silicate-based structure, together with varying amounts of Na, Ca, Al, Mg, K, Fe, Mn, and minor high-Z elements. SEM observations revealed heterogeneous surface morphologies, including pores, cracks, rounded particles, and corrosion-like regions, indicating the effects of long-term environmental exposure. XRD patterns confirmed the predominantly amorphous nature of the samples, with broad halos typical of silicate glass networks. The photon attenuation results showed that linear attenuation coefficient (LAC) and mass attenuation coefficient (MAC) values decrease with increasing photon energy, while half value layer (HVL) and mean free path (MFP) values increase due to the higher penetration ability of photons. At 81 keV, S5 exhibited the highest experimental LAC and MAC values, 0.3677 cm<ce:sup loc=\"post\">−1</ce:sup> and 0.2493 cm<ce:sup loc=\"post\">2</ce:sup>/g, respectively, and the lowest HVL value of 1.8849 cm, indicating better low-energy attenuation. At 383 keV, S3 showed the most favorable attenuation among the archaeological samples, with the highest LAC value of 0.1544 cm<ce:sup loc=\"post\">−1</ce:sup> and the lowest HVL value of 4.4891 cm. This result was associated with its higher Ca and Fe contents. The equivalent atomic number (Zeq)<ce:bold>,</ce:bold> kinetic energy released per unit mass (KERMA)<ce:bold>,</ce:bold> mean free path (MFP)<ce:bold>,</ce:bold> energy absorption buildup factor (EABF), and exposure buildup factor (EBF) evaluations further confirmed that photon interaction characteristics are strongly affected by both photon energy and chemical composition. The results show that the Salkaya archaeological glasses, although not produced for shielding purposes, provide useful insight into the relationship between composition, ageing, structure, and photon interaction in naturally aged silicate glass systems.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"25 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149290776","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":"Accuracy of Iodine-131 dosimetry using planar imaging in patients with hyperthyroidism: a SIMIND Monte Carlo study","authors":"Venecia Magalí Calandrón, Luis Héctor Illanes, Cecilia Yamil Chain","doi":"10.1016/j.radphyschem.2026.114558","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114558","url":null,"abstract":"Radioiodine treatment is one of the therapeutic strategies for the management of hyperthyroidism. In clinical practice, the therapy is based on administering the same amount of [<ce:sup loc=\"pre\">131</ce:sup>I] sodium iodide (around 370 MBq) to all patients, with the potential risk of a suboptimal therapeutic response in some patients or unnecessary radiation exposure in others. Dosimetry calculations, which require accurately quantifying the activity uptake by the thyroid gland, are essential for personalizing the therapy. This study assessed the accuracy of absorbed dose calculations for radioiodine treatment planning for hyperthyroidism, based on a computational approach. The simulation model was grounded on two existing tools: the SIMIND Monte Carlo code, which models a clinical scintillation camera, and a voxelized anthropomorphic computational Zubal phantom as an anatomical model of the patient. The clinical simulator was used to obtain anterior planar thyroid images from computational models of hyperthyroid patients under various acquisition scenarios, to determine the accuracy of a pre-therapeutic planar dosimetry procedure using [<ce:sup loc=\"pre\">131</ce:sup>I] sodium iodide; a study that, to date, has not been addressed systematically. A schedule involving three- early uptake assessments, i.e., thyroid images obtained up to 48 hours after radiopharmaceutical administration, was modeled as a clinically representative scenario. The simulated images were analyzed to quantify the <ce:sup loc=\"pre\">131</ce:sup>I localized in the thyroid gland, and dosimetry calculations were performed using these data. The results showed that the activity quantified from the simulated anterior planar thyroid images overestimated both the actual activity and the resulting absorbed doses in the thyroid (error less than 7 %). No meaningful differences were observed in the quantified activity if medium- or high-energy collimators were used. The study suggests that it is possible to perform pre-therapeutic dosimetry calculations based on early anterior planar images in hyperthyroid patients without concomitant conditions that prolong radioiodine uptake, with an error one order of magnitude smaller than the spread of thyroid absorbed dose values observed in patients with hyperthyroidism.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"15 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149291226","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":"Assessment of gamma radiation influence on high-density polyethylene (HDPE) in oxygenated solvent media","authors":"Weslei Marcos da Silva Teixeira, Adriana Marques, Aneuri Souza de Amorim, Luciana Carvalheira","doi":"10.1016/j.radphyschem.2026.114565","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114565","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"500 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149232021","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":"Influence of Electron Beam Energy on the Mechanical and Visual Properties of Medical-Grade Silicone","authors":"Md Kamrul Hasan, Yelin Ni, Mark K. Murphy, Leonard S. Fifield, Ilia Geltser, Suresh D. Pillai, Gustavo Varca, Cristofer Tong","doi":"10.1016/j.radphyschem.2026.114562","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114562","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"60 10 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149232029","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":"Activation cross sections of 66,67,68Ga, 68,69Ge, and 65Zn produced from alpha-induced reactions on natural Zn up to 31 MeV","authors":"Sk Wasim Raja,&nbsp;V. Naik","doi":"10.1016/j.radphyschem.2026.114552","DOIUrl":"10.1016/j.radphyschem.2026.114552","url":null,"abstract":"<div><div>Activation cross sections of ^natZn(α,x) ^66,67,68Ga, ^68,69Ge, and ⁶⁵Zn nuclear reactions were measured from 16.41 to 30.54 MeV. Standard stacked-foil activation technique was employed for irradiation, and residual activity measurements were performed using an HPGe detector. The present results for the reactions ^natZn(α,x) ^66,67,68Ga, ^68,69Ge, and ⁶⁵Zn were compared with the experimental data from the literature and theoretical data from the TENDL-2023 nuclear data library based on the TALYS code (version 2.0). Integral yields of these reactions were calculated from the presently measured cross section data and compared with literature experimental yield data. The present data match well with the literature data for the studied radionuclides within experimental uncertainties.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"252 ","pages":"Article 114552"},"PeriodicalIF":3.5,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208845","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":"“Lead fluoride as a multifunctional modifier in bismuth gadolinium borate glasses: Optical, structural, and radiation attenuation characterization” [Radiat. Phys. Chem. 226 (2025) 112239 https://doi.org/10.1016/j.radphyschem.2024.112239]","authors":"Hesham M.H. Zakaly,N. Almousa,Shams A.M. Issa,M. Rashad,Mayeen Uddin Khandaker","doi":"10.1016/j.radphyschem.2026.114526","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114526","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"13 1","pages":"114526"},"PeriodicalIF":2.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208850","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":"Phytosanitary irradiation prolonged shelf-life by reducing ethylene production rate and gene expression in cold-stored ‘Nam Dok Mai Si Thong’ mango","authors":"Phongrapi Wichitkunanan,Nutchanat Phakdee,Suwimol Jetawattana,Chitose HONSHO,Peerasak Chaiprasart","doi":"10.1016/j.radphyschem.2026.114563","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114563","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"23 1","pages":"114563"},"PeriodicalIF":2.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208844","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":"Comparative neutronic assessment of U3Si2-based accident-tolerant fuels in a two-batch APR-1400","authors":"Khurrum Saleem Chaudri, Mohammad Alrwashdeh, Mohamed Lahdour, Antonio Cammi, Saeed A. Alameri","doi":"10.1016/j.radphyschem.2026.114509","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114509","url":null,"abstract":"Uranium silicide (U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>) is a leading candidate for accident-tolerant fuel in light-water reactors due to its higher uranium density and superior thermal conductivity compared with conventional UO<ce:inf loc=\"post\">2</ce:inf>. However, its limited oxidation resistance and phase stability under reactor-relevant conditions have motivated the development of alternative designs, including composite and doped fuel architectures. This study presents a comparative neutronic evaluation of several U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>-based fuel concepts for a 24-month APR-1400 equilibrium core using the CASMO4E/SIMULATE3 code system. The CASMO4E/SIMULATE3 calculation route for accident-tolerant fuel analysis is verified against the VERA ATF benchmark, proposed by ORNL. The investigated options include monolithic U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>, homogeneous U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>–UB<ce:inf loc=\"post\">2</ce:inf> composite fuel, Cr-doped U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>, UO<ce:inf loc=\"post\">2</ce:inf>–U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf> composite fuel, and newly proposed multilayer U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf>/UB<ce:inf loc=\"post\">2</ce:inf> configurations using natural boron. These multilayer concepts are introduced to suppress excess reactivity, reduce dependence on costly B-11 enrichment, and, in the outer-layer configuration, limit direct exposure of U<ce:inf loc=\"post\">3</ce:inf>Si<ce:inf loc=\"post\">2</ce:inf> to water or steam.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"297 1","pages":"114509"},"PeriodicalIF":2.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123091","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 “Measurement of 27Al(α, n) thick-target yields by activation and 27Al(α, nγ) reaction prompt γ rays” [Radiat. Phys. Chem. 244, (2026), 113815]","authors":"O. Alonso-Sañudo,L.M. Fraile,J.A. Briz,A. Illana,J. Agramunt,J. Benito,M.J.G. Borge,M. Caballero,D. Cano-Ott,G. Cortés,A. Espinosa-Rodriguez,B. Fernández,G. García,V. García-Távora,C. Guerrero,J. Llanes,M. Llanos-Expósito,T. Martínez,N. Mont-Geli,J.R. Murias,E. Nácher,A. Nakbi,V.M. Nouvillas,V.V. Onecha,M. Pallás,A. Perea,A. Pérez de Rada,J. Sánchez-Prieto,V. Sánchez-Tembleque,J.L. Taín,A. Tarifeño-Saldivia,O. Tengblad,J.M. Udías,S. Viñals","doi":"10.1016/j.radphyschem.2026.114551","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2026.114551","url":null,"abstract":"","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"35 1","pages":"114551"},"PeriodicalIF":2.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208847","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}