Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms最新文献

{"title":"Effect of argon ion irradiation on the electrical transport and electronic characteristics of Bi2Se3 single crystals","authors":"V.V. Marchenkov ,&nbsp;B.M. Fominykh ,&nbsp;A.N. Perevalova ,&nbsp;A.E. Stepanov ,&nbsp;S.V. Naumov ,&nbsp;E.B. Marchenkova ,&nbsp;A.M. Bartashevich ,&nbsp;K.V. Shalomov ,&nbsp;N.V. Gushchina ,&nbsp;V.V. Ovchinnikov","doi":"10.1016/j.nimb.2025.165633","DOIUrl":"10.1016/j.nimb.2025.165633","url":null,"abstract":"<div><div>The electrical resistivity, Hall effect and magnetoconductivity of a Bi₂Se₃ topological insulator were studied before and after argon ion irradiation with fluences of 1.25∙10¹⁵ cm⁻² and 1.25∙10¹⁷ cm⁻² and energies of 10–15 keV at temperatures from 5 to 300 K in magnetic fields up to 9 T. Irradiation was found to lead to an increase in the electrical resistivity and a decrease in the current carrier concentration. In addition, it was found that the values of current carrier mobility, mean free path and magnetoconductivity do not change monotonically with the irradiation dose. It was suggested that the observed effects can be caused by both a change in the topology of the Fermi surface and the appearance of additional scattering centers as a result of irradiation.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"561 ","pages":"Article 165633"},"PeriodicalIF":1.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182965","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":"A new map-polynomial fitting extrapolation method of data in the low scattering vector region for dilute polydisperse spherical systems in SAXS","authors":"Rongchao Chen ,&nbsp;Zhihong Li ,&nbsp;Jianhua He","doi":"10.1016/j.nimb.2024.165606","DOIUrl":"10.1016/j.nimb.2024.165606","url":null,"abstract":"<div><div>Dilute polydisperse system is a common research object in small angle X-ray scattering (SAXS). In SAXS studies, the extrapolation of the scattering data in the low scattering vector region is necessary for many quantitative structural analyses. The classical Guinier extrapolation method is based on the Guinier approximation, which is only applicable to the scattering data with a distinct linear segment on the Guinier plot. In this contribution, a new map-polynomial fitting extrapolation method is proposed. It takes the bilateral data constructed by mapping the measured data as the fitting object, and provides reliable extrapolation results within an explicit fitting range and a specific polynomial order. The new method is superior to the Guinier method in terms of extrapolation effect and applicability range. The feasibility of the proposed method is verified by experimental sample.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165606"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173993","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":"Parametrization of dose profiles of therapeutic minibeams of protons, 4He, 12C, and 16O","authors":"Savva Savenkov,&nbsp;Alexandr Svetlichnyi,&nbsp;Igor Pshenichnov","doi":"10.1016/j.nimb.2024.165604","DOIUrl":"10.1016/j.nimb.2024.165604","url":null,"abstract":"<div><div>Single minibeams of protons, ⁴He, ¹²C and ¹⁶O in water were modeled with Geant4, and their dose distributions were parameterized with double-Gauss–Rutherford (DGR) functions. Dose distributions from arrays of 16 parallel minibeams centered on a rectangular or hexagonal grid were constructed from the parameterized minibeam profiles to simulate the lateral convergence of the minibeams resulting in a homogeneous dose field in the target tumor volume. Peak-to-valley dose ratios (PVDR) and dose-volume histograms (DVH) were calculated for the parameterized dose distributions and compared with those obtained directly from Geant4 modeling of minibeam arrays. The similarity of the results obtained by these two methods suggests that the fast calculation of dose profiles of minibeam arrays based on the DGR parameterizations proposed in this work can replace the time-consuming MC modeling in future preclinical studies and also in the development of treatment planning systems for minibeam therapy.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165604"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173975","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":"Fast measurement of the quasi-monochromatic MeV γ-beam flux using the 63Cu( γ, n)62Cu reaction at the Shanghai Laser Electron Gamma Source","authors":"Zhi-Cai Li ,&nbsp;Yu-Xuan Yang ,&nbsp;Wen Luo ,&nbsp;Gong-Tao Fan ,&nbsp;Hong-Wei Wang ,&nbsp;Long-Xiang Liu ,&nbsp;Zi-Rui Hao ,&nbsp;Hang-Hua Xu ,&nbsp;Xin-Xiang Li ,&nbsp;Yun Yuan ,&nbsp;Yue Zhang ,&nbsp;Sheng Jin ,&nbsp;Kai-Jie Chen ,&nbsp;Pu Jiao ,&nbsp;Meng-Die Zhou ,&nbsp;Zhen-Wei Wang ,&nbsp;Qian-Kun Sun ,&nbsp;Shan Ye ,&nbsp;Rui-Rui Xu ,&nbsp;Chuang-Ye He","doi":"10.1016/j.nimb.2024.165595","DOIUrl":"10.1016/j.nimb.2024.165595","url":null,"abstract":"<div><div>Shanghai Laser Electron Gamma Source (SLEGS) is a powerful laser-Compton scattering (LCS) <span><math><mi>γ</mi></math></span>-ray facility that provides a quasi-monochromatic MeV <span><math><mi>γ</mi></math></span>-ray beam with a moderate flux of 10<span><math><msup><mrow></mrow><mrow><mn>5</mn></mrow></msup></math></span>-10<span><math><msup><mrow></mrow><mrow><mn>7</mn></mrow></msup></math></span> photons/s. Accurate and fast measurement of the SLEGS <span><math><mi>γ</mi></math></span>-beam flux is critical for the upcoming photonuclear experiments. In this study, an activation method based on ⁶³Cu(<span><math><mi>γ</mi></math></span>, n)⁶²Cu reaction is proposed for fast measurement of the SLEGS <span><math><mi>γ</mi></math></span>-beam flux. By operating at a low beam flux of 10<span><math><msup><mrow></mrow><mrow><mn>4</mn></mrow></msup></math></span>-10<span><math><msup><mrow></mrow><mrow><mn>5</mn></mrow></msup></math></span> photons/s, the SLEGS <span><math><mi>γ</mi></math></span>-beam flux is measured within the energy range of 11.66-19.08 MeV. The <span><math><mi>γ</mi></math></span>-beam flux as a function of laser power is also investigated. It was found that the flux data obtained by the proposed method is in reasonable agreement with the online monitoring of the LaBr<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> detector and the GEANT4 simulations. The dependence of the total time (the sum of the irradiation time, the cooling time, and the detection time for identifying characteristic <span><math><mi>γ</mi></math></span>-ray emission) on the <span><math><mi>γ</mi></math></span>-beam flux is further studied. The total time could be controlled within 100 s when the beam flux exceeds 10<span><math><msup><mrow></mrow><mrow><mn>8</mn></mrow></msup></math></span> photons/s, suggesting the great potential of the ⁶³Cu activation method to quasi-real-time measure the LCS <span><math><mi>γ</mi></math></span>-ray beam at high flux conditions.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165595"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173990","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":"Inelastic Ion-Surface collisions and physics education","authors":"F. Chiappetta ,&nbsp;C. Meringolo ,&nbsp;P. Riccardi ,&nbsp;G. Prete","doi":"10.1016/j.nimb.2025.165613","DOIUrl":"10.1016/j.nimb.2025.165613","url":null,"abstract":"<div><div>The physics of inelastic ion-surface collisions has interesting point of contact with curricular arguments of secondary school programs, which makes possible interesting educational activities for school pupils in research laboratories. On this basis, in these last years we developed educational activities aimed at introducing school pupils to topics of active scientific research and of societal relevance. Since the education and public outreach is becoming increasingly important in the working life of research scientists, we would like to discuss some of the didactic activities developed, that could be of interest for the broad community of the inelastic ion-surface collisions.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165613"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174520","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":"Between manufacturing and trade: IBA analyses of archaeological glass finds discovered at two Dacian settlements: Sarmizegetusa Regia and Piroboridava","authors":"Roxana Bugoi ,&nbsp;Despina Măgureanu ,&nbsp;Massimo Chiari ,&nbsp;Laurent Pichon ,&nbsp;Cătălin Cristescu ,&nbsp;Paul Ciobotaru","doi":"10.1016/j.nimb.2024.165593","DOIUrl":"10.1016/j.nimb.2024.165593","url":null,"abstract":"<div><div>This publication reports the IBA results on 81 glass items discovered at <em>Sarmizegetusa Regia</em> (Grădiștea de Munte, Hunedoara County) and <em>Piroboridava</em> (Poiana, Galaţi County), Romania, dated to the 1st century CE. External beam PIXE-PIGE measurements with 3 MeV protons were performed at LABEC, INFN, Florence, Italy. The IBA data indicated strong similarities, in terms of chemical composition, with coeval Roman and Hellenistic finds, supporting two archaeological hypotheses: 1) raw glass was imported to Dacia from the Roman Empire and locally shaped into various finished products; and 2) glass vessels were also imported to the Dacian settlements.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165593"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthetic data generation from a fine particulate matter PM2.5 experimental data seed and its use in PMF and APCA","authors":"Javier Flores-Aldape ,&nbsp;Francisca Aldape ,&nbsp;Javier Flores-Maldonado","doi":"10.1016/j.nimb.2024.165599","DOIUrl":"10.1016/j.nimb.2024.165599","url":null,"abstract":"<div><div>Synthetic databases produced using the Gaussian Copula Model, among others, represent a great aid to analysing experimental databases. Particularly, when the experimental databases have limited data density, synthetic databases can boost the data density without significantly altering the experimental data interpretation. In this work, experimental data of two years and 10 months of fine airborne particulate matter (PM 2.5), analysed by PIXE, ditto the total concentration and concentrations of 15 elements, were used as seed to feed the model and obtain synthetic data. An analytical study of both databases was conducted using Positive Matrix Factorisation (PMF) and Absolute Principal Component Analysis (APCA), which are the most common algorithms used by the community, some differences, acceptable limitations, and advantages are discussed in this document.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165599"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174526","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":"Study of the nitrogen fluorescence yield under different environmental conditions in alpha radioactivity telemetry technique","authors":"Quanxiao Wang ,&nbsp;Wanlin Li ,&nbsp;Xinfeng Pei ,&nbsp;Binghua Song ,&nbsp;Junliang Chen ,&nbsp;Yiqiang Zhong ,&nbsp;Lianshun Li ,&nbsp;Jian Wang ,&nbsp;Tinggui Yang ,&nbsp;Shuyao Si ,&nbsp;Kaihong Fang","doi":"10.1016/j.nimb.2024.165605","DOIUrl":"10.1016/j.nimb.2024.165605","url":null,"abstract":"<div><div>α Decay in the nuclear fuel cycle poses significant hazards due to its strong ionizing capability, making effective detection essential. Conventional detection methods require time-consuming scanning or sampling, often unsuitable for extreme environments and increasing radiation risks. Alpha Radioactivity Telemetry Technology (ARTT), a non-contact α radiation detecting method via secondary nitrogen fluorescence detection, addresses the limitations of traditional methods and has gained significant attention in recent years. However, limited research on α-induced nitrogen fluorescence under varying conditions hampers environmental corrections and quantitative analysis, constraining applications of ARTT. This article examines the dependence of α-induced nitrogen fluorescence yield on energy, pressure, humidity, and nitrogen–oxygen ratio, presenting measurements for all major 2P system emission bands. The results indicate that (1) fluorescence yield remains unaffected by deposited energy or α-ray energy within 1.5–4 MeV, (2) yield dependence on pressure and humidity aligns with theoretical expectations, but deviates for nitrogen–oxygen ratios, and (3) temperature has minimal impact, with a 30 °C variation around 25 °C affecting fluorescence yield by less than 5 %. In contrast, at 1 atm pressure, the yield of air is several hundred times greater than at zero pressure. At 25 °C, the yield of dry air is 1.4 times that of air at 100 % RH. And the one of pure nitrogen is over ten times higher than the gas with 20 % nitrogen and 80 % oxygen. This work provides a data foundation for environmental corrections in ARTT applications.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165605"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173989","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":"Evolution of dislocation loops in chromium under single hydrogen and helium ion irradiation","authors":"Qining Zheng ,&nbsp;Mingju Chen ,&nbsp;Biao Chen ,&nbsp;Shuqin Wen ,&nbsp;Ce Zheng ,&nbsp;Shuiqing Liu ,&nbsp;Guanghai Bai ,&nbsp;Jinshan Li","doi":"10.1016/j.nimb.2024.165602","DOIUrl":"10.1016/j.nimb.2024.165602","url":null,"abstract":"<div><div>Dislocation loops, which are typical irradiation defects, can be influenced by hydrogen and helium produced by transmutation reactions. The evolution of dislocation loops in chromium (Cr) coatings under room temperature irradiation with single H⁺ and He⁺ is observed using transmission electron microscopy (TEM). At equivalent damage levels, the density of dislocation loops is higher under irradiation with He⁺ compared to that with H⁺. This indicates that helium promotes the nucleation of dislocation loops more effectively than hydrogen does, whereas hydrogen promotes the growth of dislocation loops more, resulting in larger loop sizes. Irradiation with both hydrogen and helium ions resulted in the formation of more a₀ 〈100〉 dislocation loops in Cr, comprising roughly half of the total observed loops.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165602"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174519","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":"Molecular dynamics investigation on crack-healing and tensile deformation mechanisms in zirconium under overlapping collision cascades","authors":"Wei Li ,&nbsp;Han Zhao ,&nbsp;Xiangguo Zeng ,&nbsp;Xing Yang ,&nbsp;Minghua Chi ,&nbsp;Yunpeng Gao","doi":"10.1016/j.nimb.2024.165608","DOIUrl":"10.1016/j.nimb.2024.165608","url":null,"abstract":"<div><div>In this work, molecular dynamics simulations were performed to investigate the interaction between the micro-crack and overlapping collision cascades in zirconium. A comprehensive analysis of the formation and recombination of irradiation defects was conducted to gain an atomic-level understanding of crack healing. Crack healing occurs when the thermal spike’s core covers the crack due to the recrystallization of atoms with high kinetic energy after the first collision cascade. We delved into the formation mechanism of vacancy dislocation loops in crack-healing Zr under overlapping collision cascades, which account for the combined effects of overlapping collision-induced vacancy collapse and recrystallization-induced vacancy migration. The uniaxial tensile deformation of crack-free and cracked Zr was extensively studied before and after irradiation. Strength enhancement was observed after crack healing, inhibiting pyramidal slipping and promoting the formation of nanotwins during the tensile process. The movement of nanotwin planes controls dislocation nucleation and movement.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"559 ","pages":"Article 165608"},"PeriodicalIF":1.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174522","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}