Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms最新文献_第5页

Prototype magnetic deflector system for light element particle induced X-ray emission analysis 用于轻元素粒子诱导x射线发射分析的磁偏转系统原型

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-16 DOI: 10.1016/j.nimb.2025.165837

Todd A. Byers, Darshpreet Kaur Saini, Charles T. Bowen, Bibhudutta Rout, Gary A. Glass

{"title":"Prototype magnetic deflector system for light element particle induced X-ray emission analysis","authors":"Todd A. Byers, Darshpreet Kaur Saini, Charles T. Bowen, Bibhudutta Rout, Gary A. Glass","doi":"10.1016/j.nimb.2025.165837","DOIUrl":"10.1016/j.nimb.2025.165837","url":null,"abstract":"<div><div>The improvements made to ultra-thin windows for X-ray detectors in recent years have allowed for the detection of elements as light as lithium. However, their use with particle induced X-ray emission (PIXE) spectroscopy typically requires the addition of an absorber thick enough to prevent backscattered ions from reaching the detector. This also prevents lower energy (< 1 keV) X-rays from reaching the detector. By using a magnetic field to deflect backscattered ions away, the absorber can be eliminated, allowing for the detection of ultra-low energy X-rays. At the Ion Beam Laboratory of the University of North Texas, a prototype PIXE system using a magnetic deflector has been developed to allow for the detection and measurement of X-rays from light elements using a silicon drift X-ray detector with a ultra-thin window. With an average magnetic flux density of 0.88 T along the center, backscattered protons of an energy up to 1.22 MeV were successfully deflected away from the X-ray detector. Light element PIXE was performed with a 1 MeV proton beam on manganese oxide, sodium chloride and a Hibiscus rosa-sinenesis leaf. Elements of 5 ≤ Z ≤ 30 were successfully detected.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165837"},"PeriodicalIF":1.4,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858373","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}

引用次数: 0

Computer simulation for the overlapping of ion tracks with finite lifetimes 有限寿命离子轨迹重叠的计算机模拟

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-15 DOI: 10.1016/j.nimb.2025.165831

A. Iwase , S. Nishio , F. Hori

引用次数: 0

Effects of niobium solid-solution on cascade damage evolution in molybdenum-niobium alloys 铌固溶体对钼铌合金级联损伤演化的影响

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-14 DOI: 10.1016/j.nimb.2025.165832

Lu Sun, Meng-Lu Qin, Ye-Xin Yang, Xin-Hua Yan, Yan Ma, Zhen-Feng Tong

{"title":"Effects of niobium solid-solution on cascade damage evolution in molybdenum-niobium alloys","authors":"Lu Sun, Meng-Lu Qin, Ye-Xin Yang, Xin-Hua Yan, Yan Ma, Zhen-Feng Tong","doi":"10.1016/j.nimb.2025.165832","DOIUrl":"10.1016/j.nimb.2025.165832","url":null,"abstract":"<div><div>Single crystal Molybdenum-Niobium (Mo-Nb) alloys serve as critical emitter materials for thermionic space nuclear reactors, where radiation-induced damage constitutes a fundamental constraint on their operational reliability. Molecular dynamics (MD) simulations on primary displacement cascades in pure Mo and Mo-Nb alloys reveal that high-energy PKAs (>30 keV) significantly promote Frenkel pair survival and defect cluster formation, while elevated temperatures suppress damage accumulation by accelerating defect migration and recombination. Nb solid-solution with low concentrations marginally increase stabilized defect density, whereas localized Nb segregation apparently amplifies intra-cascade defect production through preferential cluster nucleation. Notably, the minimal Nb incorporation in residual interstitial defects is driven by the prohibitively high formation energy of Nb-Nb dumbbells, rapid lattice re-incorporation kinetics of Nb interstitials, and suppressed interstitial mobility in Nb-containing systems. These findings establish an atomic-scale insight for radiation damage evolution in Mo-Nb alloys, demonstrating how Nb solid solution stability simultaneously regulates defect generation and clustering.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165832"},"PeriodicalIF":1.4,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831023","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}

引用次数: 0

Collision of H and He ions with silicon: A time dependent density functional theory study 氢离子和氦离子与硅的碰撞：一个随时间变化的密度泛函理论研究

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-14 DOI: 10.1016/j.nimb.2025.165830

Bin Zhang , Tao Ying , Weiqi Li , XiaoDong Xu , Jianqun Yang , Xingji Li

{"title":"Collision of H and He ions with silicon: A time dependent density functional theory study","authors":"Bin Zhang , Tao Ying , Weiqi Li , XiaoDong Xu , Jianqun Yang , Xingji Li","doi":"10.1016/j.nimb.2025.165830","DOIUrl":"10.1016/j.nimb.2025.165830","url":null,"abstract":"<div><div>This study employs time-dependent density functional theory (TDDFT) to simulate the collision processes of hydrogen (H) and helium (He) ions (0.5–10 keV) with silicon along the < 100 > orientation. By comparing the differences in stopping power among particles with different charge states (e.g., proton, H, He, He<sup>2+</sup>) in the material, it is found that the projectile charge state and atomic number are key factors governing the energy dissipation of incident ions. Further analysis combining real-time charge-state tracking and force evolution elucidates the microscopic mechanisms of ions energy dissipation in the material. A comparison with SRIM simulation results confirms the critical role of atomic/electronic structure in the accurate calculation of stopping power. Based on the density of states (DOS) and differential charge density, we elucidate the characteristic evolution of electronic states and the charge transfer dynamics in collision systems. This research provides important theoretical support for a deeper understanding of ion collision dynamics and the precise construction of radiation damage models.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165830"},"PeriodicalIF":1.4,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831028","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}

引用次数: 0

Influence of electronic excitations on damage kinetics in SiC 电子激发对SiC损伤动力学的影响

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-13 DOI: 10.1016/j.nimb.2025.165835

A.B. Serban , N. Djourelov , L. Thomé , G. Gutierrez

{"title":"Influence of electronic excitations on damage kinetics in SiC","authors":"A.B. Serban , N. Djourelov , L. Thomé , G. Gutierrez","doi":"10.1016/j.nimb.2025.165835","DOIUrl":"10.1016/j.nimb.2025.165835","url":null,"abstract":"<div><div>Silicon carbide is a versatile material renowned for its thermal stability and radiation resistance, making it a strong candidate for use in nuclear power plants, radiation detectors, and photovoltaic devices. This study investigates the formation and recovery of irradiation-induced defects in 6H-SiC using single (S<sub>n</sub>) and dual (S<sub>n</sub>&S<sub>e</sub>, S<sub>n</sub> + S<sub>e</sub>) ion beam irradiation. Samples irradiated with 0.9-MeV I and 27-MeV Fe ions were used to independently and simultaneously probe nuclear (S<sub>n</sub>) and electronic (S<sub>e</sub>) energy loss effects. Damage kinetics were carried out by irradiating at different fluence levels. Defect evolution was characterized using variable energy slow positron Doppler Broadening Spectroscopy (DBS) and Rutherford backscattering spectrometry in channeling mode (RBS/C). The findings highlighted that double-beam irradiation can mitigate the amorphization effects typically observed under single-beam irradiation. It provided a deeper understanding of the SiC behavior under radiation, which is crucial for optimizing its performance and reliability in nuclear and photovoltaic applications.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165835"},"PeriodicalIF":1.4,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831027","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}

引用次数: 0

Neutronic simulation of the seventh irradiation experiment at the Swiss spallation neutron source 瑞士散裂中子源第七次辐照实验的中子模拟

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-05 DOI: 10.1016/j.nimb.2025.165820

Wei Jiang , Wei Lu , Yong Dai

{"title":"Neutronic simulation of the seventh irradiation experiment at the Swiss spallation neutron source","authors":"Wei Jiang , Wei Lu , Yong Dai","doi":"10.1016/j.nimb.2025.165820","DOIUrl":"10.1016/j.nimb.2025.165820","url":null,"abstract":"<div><div>The SINQ Target Irradiation Program (STIP) is one of the important research projects performed at the Paul Scherrer Institute (PSI). The seventh experiment of the SINQ Target Irradiation Program (STIP-VII) was conducted with SINQ Target 10 from 2013 to 2014 and the total proton charge received by the target was 11.7 Ah. A radiation damage assessment was performed using MCNPX to predict the key radiation damage productions of displacement, helium and hydrogen for six materials, 9Cr-1Mo steel, Zry-2, Al, SiC, Ta and W, placed in different specimen rods. The incident proton source term for the assessment was produced with a gamma mapping measurement performed on the proton beam entrance window. The fluences of protons and neutrons as well as the energy deposition in the SINQ Target 10 were calculated. At an average proton beam current of 1.45 mA, the peak proton and neutron fluxes are 2.28 × 10<sup>14</sup>p/cm<sup>2</sup>/s and 5.60 × 10<sup>14</sup>n/cm<sup>2</sup>/s, respectively. The maximum irradiation dose and helium productions for steel specimens are 26.5 dpa and 2240 appm, respectively.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165820"},"PeriodicalIF":1.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771382","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}

引用次数: 0

Measurement and calculation of leakage neutron spectra from beryllium sample using a white neutron field 用白中子场测量和计算铍样品的泄漏中子谱

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-05 DOI: 10.1016/j.nimb.2025.165793

X. Zhang, R. Han, B. Liu, G. Tian, F. Shi, H. Sun, Z. Chen

引用次数: 0

Gamma-irradiation-induced surface traps in polymethyl methacrylate: Evolution and impact on insulation performance γ辐照诱导的聚甲基丙烯酸甲酯表面陷阱：演变和对绝缘性能的影响

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-01 DOI: 10.1016/j.nimb.2025.165817

Yawei Zhou , Shi Yang , Yixiang Hu , Deyu He , Aixu Zhong , Jiahui Yin , Weixi Luo , Chunqing He

{"title":"Gamma-irradiation-induced surface traps in polymethyl methacrylate: Evolution and impact on insulation performance","authors":"Yawei Zhou , Shi Yang , Yixiang Hu , Deyu He , Aixu Zhong , Jiahui Yin , Weixi Luo , Chunqing He","doi":"10.1016/j.nimb.2025.165817","DOIUrl":"10.1016/j.nimb.2025.165817","url":null,"abstract":"<div><div>The evolution of gamma-irradiation-induced surface traps and their impact on the insulation properties of polymethyl methacrylate (PMMA) were investigated. Gamma irradiation was carried out at room temperature using a <sup>60</sup>Co source, with irradiation doses are 0.1, 1.0, 10, 100 kGy, respectively. The surface morphologies, free volume, trap distribution, and vacuum surface flashover properties of both pristine and gamma-irradiated samples were measured. Cracks and holes appeared on the surface of PMMA samples successively after gamma irradiation. Both cross-linking and degradation reactions occur simultaneously during the irradiation process. Gamma irradiation alters PMMA surface microstructure, directly affecting its vacuum insulation performance via trap formation. Appropriate gamma irradiation is an effective method to improve the vacuum surface insulation properties of PMMA. Positron annihilation lifetime spectroscopy is proposed as a new method to characterize the surface trap properties of dielectric materials.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165817"},"PeriodicalIF":1.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749379","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}

引用次数: 0

Beam-pulsing study for a 100 MeV proton cyclotron 100兆电子伏质子回旋加速器的束脉冲研究

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-01 DOI: 10.1016/j.nimb.2025.165805

Ji Luyu, An Shizhong, Huang Peng, Zheng Xia, Song Guofang, Xing Jiansheng, Ji Bin, Li Pengzhan, Bao Jie, Cao Lei, Liu Zhenwei, Wei Junyi, Ren Jie, Wang Jincheng, Liu Yingyi

{"title":"Beam-pulsing study for a 100 MeV proton cyclotron","authors":"Ji Luyu, An Shizhong, Huang Peng, Zheng Xia, Song Guofang, Xing Jiansheng, Ji Bin, Li Pengzhan, Bao Jie, Cao Lei, Liu Zhenwei, Wei Junyi, Ren Jie, Wang Jincheng, Liu Yingyi","doi":"10.1016/j.nimb.2025.165805","DOIUrl":"10.1016/j.nimb.2025.165805","url":null,"abstract":"<div><div>The compact cyclotron CYCIAE-100, developed by the China Institute of Atomic Energy (CIAE), can generate a continuous proton beam with an energy of 100 MeV. To meet the pulsed beam requirements for nuclear data measurements, a beam pulsing system was developed. A chopper was installed in the injection line to convert the continuous beam from the ion source into a pulsed beam with a frequency adjustable from the MHz range to lower frequencies. Two phase selectors were used to limit the beam’s phase width, and a dual extraction method was employed to reduce beam overlaps in the extraction region, thus achieving quasi-single-turn extraction. The design and fabrication of the chopper and phase selectors were completed, and experimental tests were conducted. The experimental results demonstrated that the pulse width was successfully compressed to less than 5 ns, ensuring sufficiently high energy resolution and providing the conditions for nuclear data measurement experiments.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"567 ","pages":"Article 165805"},"PeriodicalIF":1.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749378","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}

引用次数: 0

New parametrisation for low energy fusion cross-sections 低能聚变截面的新参数化

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-07-31 DOI: 10.1016/j.nimb.2025.165819

V.V. Gaganov

引用次数: 0