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

Molecular dynamics study of irradiation damage and helium effects in a simplified Fe–Ni–Cr alloy system: Relevant to alloy 800H 简化Fe-Ni-Cr合金体系辐照损伤及氦效应的分子动力学研究：与合金800H相关

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 : 2025-10-04 DOI: 10.1016/j.nimb.2025.165871

T.P. Kaloni, I. Cheik Njifon, E. Torres

{"title":"Molecular dynamics study of irradiation damage and helium effects in a simplified Fe–Ni–Cr alloy system: Relevant to alloy 800H","authors":"T.P. Kaloni, I. Cheik Njifon, E. Torres","doi":"10.1016/j.nimb.2025.165871","DOIUrl":"10.1016/j.nimb.2025.165871","url":null,"abstract":"<div><div>Fe–Ni–Cr alloy 800H is a critical structural material in nuclear reactors. Under irradiation, it faces significant challenges due to defect formation and Helium (He) generation, which adversely affect its microstructure and durability. In this study, we conducted molecular dynamics simulations of the combined effects of He and irradiation in polycrystalline Fe–Ni–Cr alloy 800H. Our findings show that irradiation induces the transition of the polycrystals into a single crystal. However, increasing the number of grains and He concentration favored the polycrystalline state. We also observe a decrease in the number of dislocations and an increase in large defects with the increase of the He content. Our structural evaluations reveal that He clusters mainly accumulate at those large defects, which are surrounded by dislocation loops. The interplay between the formation of He clusters and irradiation damage results in substantially deteriorating the mechanical properties of Fe–Ni–Cr alloy 800H structures. Our simulations provide valuable insights into the degradation mechanisms under the combined effects of He and irradiation damage.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"569 ","pages":"Article 165871"},"PeriodicalIF":1.4,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223247","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

129I measurements with a compact AMS facility at CIAE 使用CIAE的小型AMS设备进行129I测量

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 : 2025-10-03 DOI: 10.1016/j.nimb.2025.165883

Wenhui Zhang, Qingzhang Zhao, Ming He, Tao Sun, Chengli Xiu, Kangning Li, Yiwen Bao, Jianliang Li, Wei Guo, Shengyong Su, Qubo You

引用次数: 0

First laser-ionized europium collection at CERN-MEDICIS CERN-MEDICIS的第一次激光电离铕收集

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 : 2025-09-30 DOI: 10.1016/j.nimb.2025.165872

R. Mancheva , C. Bernerd , K. Chrysalidis , T.E. Cocolios , C. Duchemin , M. Elle , R. Rossel , B. Van Dingenen

引用次数: 0

Efficient formation of negative ions for plutonium AMS 钚AMS中负离子的有效形成

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 : 2025-09-23 DOI: 10.1016/j.nimb.2025.165869

Michael Hotchkis , Keita Richardson , David Child , Dominik Koll , Anton Wallner , Klaus Wilcken

{"title":"Efficient formation of negative ions for plutonium AMS","authors":"Michael Hotchkis , Keita Richardson , David Child , Dominik Koll , Anton Wallner , Klaus Wilcken","doi":"10.1016/j.nimb.2025.165869","DOIUrl":"10.1016/j.nimb.2025.165869","url":null,"abstract":"<div><div>In an Accelerator Mass Spectrometry (AMS) instrument, the detection efficiency for rare radioisotopes is determined by a combination of ionisation efficiency, charge state yield and beam transmission. Of these, ionisation efficiency remains as the principal limitation, with few instances where efficiency greater than 1 % has been reported. Using the Vega AMS system at ANSTO, we have achieved reproducible ionisation efficiency, for formation of PuO anions, of 3–4 %. However, the achievement of high overall efficiency has come at the cost of operational efficiency, as it can take at least 10 h to consume each sample.</div><div>We have performed a series of tests to understand what determines ionisation efficiency for plutonium AMS. In the standard method used at ANSTO, plutonium is dispersed in iron oxide and mixed with niobium as ‘binder’. The overall efficiency for samples run to exhaustion is found to be linearly proportional to the total mass of loaded mixture. We have performed a series of tests investigating the effects of: (i) recess depth of material in the cathode; (ii) use of layered samples; (iii) binder / iron oxide mix; (iv) cathode materials; (v) different binder; (vi) sample surface area. We have also determined the molecular composition of the Pu anions: PuO<sub>x</sub><sup>−</sup> of extracted beams for x = 0 to 3. The results are compared to a sputtering model that has been developed to account for the observed variation in count rates versus time as the sample is consumed. Ionisation efficiency up to 6.5 % has been observed for PuO anions.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165869"},"PeriodicalIF":1.4,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118648","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

Triple-beam irradiation facility for advanced nuclear materials research at Peking University 北京大学先进核材料研究用三束辐照装置

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 : 2025-09-20 DOI: 10.1016/j.nimb.2025.165870

Chenxu Wang , Yiheng Chen , Yuan Gao , Chuan Xu , Dongpo Fu , Xiangjun Yang , Xinlu Xu , Yizhou Qian , Baoshan Zhang , Liang Xia , Xiaolei Ma , Haocheng Liu , Engang Fu , Jianming Xue , Yugang Wang

{"title":"Triple-beam irradiation facility for advanced nuclear materials research at Peking University","authors":"Chenxu Wang , Yiheng Chen , Yuan Gao , Chuan Xu , Dongpo Fu , Xiangjun Yang , Xinlu Xu , Yizhou Qian , Baoshan Zhang , Liang Xia , Xiaolei Ma , Haocheng Liu , Engang Fu , Jianming Xue , Yugang Wang","doi":"10.1016/j.nimb.2025.165870","DOIUrl":"10.1016/j.nimb.2025.165870","url":null,"abstract":"<div><div>In advanced nuclear reactors, transmutation products hydrogen and helium significantly accelerate the degradation of material properties. To simulate the service environment of structural materials in such reactors, a triple-beam irradiation facility has been established at Peking University for materials research under controlled irradiation conditions. The system is based on a 1.7 MV tandem accelerator, supplemented by two ion implanters. To improve the irradiation environment, a plasma cleaner and a liquid nitrogen cold trap have been integrated into the irradiation chamber and effectively inhibiting carbide generation even during high-temperature irradiation. Following the facility’s commissioning, both single- and triple-beam irradiation experiments were performed. The results demonstrate that synergistic hydrogen–helium irradiation significantly promotes cavity nucleation. This work provides a reliable platform for simulating complex irradiation environments and offers valuable insights into the design and evaluation of radiation-resistant materials for next-generation nuclear systems.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165870"},"PeriodicalIF":1.4,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099867","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

A novel single event effect radiation hardening design in β-Ga2O3 Schottky barrier diodes β-Ga2O3肖特基势垒二极管单事件效应辐射硬化设计

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 : 2025-09-17 DOI: 10.1016/j.nimb.2025.165860

Junzheng Gao , Yun Li , Weihao Lin , Zhimei Yang , Mingmin Huang , Yao Ma , Min Gong , Tian Yu

{"title":"A novel single event effect radiation hardening design in β-Ga2O3 Schottky barrier diodes","authors":"Junzheng Gao , Yun Li , Weihao Lin , Zhimei Yang , Mingmin Huang , Yao Ma , Min Gong , Tian Yu","doi":"10.1016/j.nimb.2025.165860","DOIUrl":"10.1016/j.nimb.2025.165860","url":null,"abstract":"<div><div>The single event effects (SEEs) of the four types of β-Ga<sub>2</sub>O<sub>3</sub> Schottky barrier diode (SBD) device structures were simulated using Sentaurus TCAD. The analysis reveals that the variations in bias voltage (V<sub>R</sub>) and linear energy transfer (LET) have a significant impact on these effects. The simulations highlight that both the distribution of the electric field and the peak lattice temperature (T<sub>Max</sub>) within the device are key determinants of SEEs in β-Ga<sub>2</sub>O<sub>3</sub> SBDs. The results indicate that the breakdown voltage (BV) of the β-Ga<sub>2</sub>O<sub>3</sub> SBD integrated with a field plate terminal technique (FP-SBD) is enhanced by approximately 170.9 % compared to the conventional device structure without the field plate terminal (C-SBD). Compared to the FP-SBD, the FP-SBD with diamond coating (FP-SBD-D) exhibits approximately 26.3 % reduction in the peak transient current and 40.3 % reduction in T<sub>Max</sub>, effectively tackling the aforementioned issues effectively. Subsequently, a notable decline in the internal collision ionization rate and current density is observed after exposure to heavy ion impacts. This study demonstrates that the synergistic effect of the FP-SBD-D effectively alleviates the influence of SEEs on β-Ga<sub>2</sub>O<sub>3</sub> SBDs, thereby diminishing the likelihood of single event burnout (SEB) in the device.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165860"},"PeriodicalIF":1.4,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099358","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

Investigations on CRC tissue mimicking materials through radiological parameters 利用放射学参数研究结直肠癌组织模拟材料

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 : 2025-09-17 DOI: 10.1016/j.nimb.2025.165842

Simranpreet Kaur , Amandeep Sharma

{"title":"Investigations on CRC tissue mimicking materials through radiological parameters","authors":"Simranpreet Kaur , Amandeep Sharma","doi":"10.1016/j.nimb.2025.165842","DOIUrl":"10.1016/j.nimb.2025.165842","url":null,"abstract":"<div><div>The study analyse the suitability of different materials, equivalents to colorectal cancer (CRC) tissue, for accurate selection of phantom composition which is crucial for advanced treatment planning. The charged particle based therapies, contributes enhanced targeting due to Bragg peak effect, result in precise dose delivery with minimum damage to healthy tissues. On the other hand gamma ray based therapies are useful to treat deep and metastatic tumours. The simulation tools like SRIM, PAGEX and Phy-X are used to examine CRC tissue equivalent materials through radiological parameters i.e. Stopping Power, Range and Effective atomic number (Z<sub>eff</sub>) for charged particle ion beams (protons, alpha particles and carbon ions) in addition to Mass Absorption Coefficient (MAC), Computed Tomography (CT) Number and Z<sub>eff</sub> for gamma photons. The comparison of results obtained from recently developed database (PAGEX) with established ones (SRIM) confirm reliability of alternative tools, with maximum relative difference of ∼ 1 % for computed results, to analyse new phantom materials through a user-friendly approach. A transparent, durable and biocompatible material namely Celluloid (C<sub>6</sub>H<sub>8</sub>N<sub>2</sub>O<sub>9</sub>) having mass density 1.45 g/cm<sup>3</sup> is found to closely mimic CRC tissue characteristics for different ion beams as well as gamma photons, thus found to be best phantom composition for trials of medical applications. The work emphasizes on the significance of best tissue equivalent materials for optimizing different radiation therapies, upgrading treatment outcomes and eventually increasing patient survival with quality of life.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165842"},"PeriodicalIF":1.4,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099359","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

Ion beam modifications of plasmonic PET flexible SERS substrates using a table top accelerator 离子束修饰等离子体PET柔性SERS衬底的桌面加速器

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 : 2025-09-17 DOI: 10.1016/j.nimb.2025.165865

Akanksha Motla , Raj Kumar , Rajendra Singh , Venugopal Rao Soma , D.K. Avasthi , S. Annapoorni

{"title":"Ion beam modifications of plasmonic PET flexible SERS substrates using a table top accelerator","authors":"Akanksha Motla , Raj Kumar , Rajendra Singh , Venugopal Rao Soma , D.K. Avasthi , S. Annapoorni","doi":"10.1016/j.nimb.2025.165865","DOIUrl":"10.1016/j.nimb.2025.165865","url":null,"abstract":"<div><div>Ion beam modification induces significant surface alterations that are crucial for applications in Surface Enhanced Raman Spectroscopy (SERS). SERS, a highly sensitive analytical technique, amplifies weak Raman signals by increasing the effective Raman cross-section of target analytes. This study investigates the development of SERS substrates using ion beam-based surface modification on flexible polymer substrates. Gold (Au) thin films were thermally evaporated onto Polyethylene Terephthalate (PET) sheets and subsequently irradiated with 10 keV Ar<sup>+</sup> ions at fluences of 1 × 10<sup>15</sup>, 3 × 10<sup>15</sup>, 1 × 10<sup>16</sup>, and 3 × 10<sup>16</sup> ions/cm<sup>2</sup>. The morphological changes in the films were characterized via Field Emission Scanning Electron Microscopy (FESEM). Both untreated and ion-irradiated films were assessed as SERS substrates for detecting Rhodamine B (RhB) dye at micro-molar (μM) and nano-molar (nM) concentrations. The findings emphasize the potential of ion-irradiated flexible polymer substrates in SERS applications. They demonstrate the crucial importance of surface engineering in improving the deposition of noble metals on the polymer surface, leading to enhanced sensing performance.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165865"},"PeriodicalIF":1.4,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099866","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

ERETCAD-rad: the multi-method and multi-function space environment radiation effect simulation software ERETCAD-rad：多方法、多功能空间环境辐射效应仿真软件

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 : 2025-09-17 DOI: 10.1016/j.nimb.2025.165866

Tao Ying , Hao Jiang , Bin Zhang , He Zhu , Weiqi Li , Zhongli Liu , Xuihai Cui , Jianqun Yang , Xingji Li

{"title":"ERETCAD-rad: the multi-method and multi-function space environment radiation effect simulation software","authors":"Tao Ying , Hao Jiang , Bin Zhang , He Zhu , Weiqi Li , Zhongli Liu , Xuihai Cui , Jianqun Yang , Xingji Li","doi":"10.1016/j.nimb.2025.165866","DOIUrl":"10.1016/j.nimb.2025.165866","url":null,"abstract":"<div><div>In this paper, we describe the ERETCAD-Rad software, which is part of the Extreme-environment Radiation Effect Technology Computer Aided Design (ERETCAD) software. The aim of ERETCAD-Rad is for the simulations of the space environment radiation effects of materials, devices, and satellites. Depending on the simulation algorithms and the characteristics of the geometry structure, ERETCAD-Rad is divided into four modules, the Three-dimensional Monte Carlo (3DMC) module, the Reverse Monte. Carlo (RMC) module, the One-dimensional Monte Carlo (1DMC) module and the sector shielding analysis (SSA) module. Multiple simulation methods such as Forward Monte Carlo (FMC), RMC and SSA, and multiple analysis functions such as total ionizing dose (TID), non-ionizing dose (NID), single particle effect (SEE), linear energy transfer (LET), non-ionizing energy loss (NIEL), energy deposition, fluence, equivalent dose, dose equivalent, internal charging are implemented in ERETCAD-Rad. Due to its functionality and flexibility, ERETCAD-Rad can satisfy the requirements of different users, for both the rapid engineering evaluations and the precise calculations of radiation effects.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165866"},"PeriodicalIF":1.4,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099360","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

Isotope Separator On-Line system tuning: Bayesian optimization applied to the transport beamline case 同位素分离器在线系统调谐：贝叶斯优化应用于输运束线情况

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 : 2025-09-16 DOI: 10.1016/j.nimb.2025.165859

Santiago Ramos Garces , Line Le , Mia Au , Alexander Schmidt , João Pedro Ramos , Marc Dierckx , Dinko Atanasov , Ivan De Boi , Sebastian Rothe , Lucia Popescu , Stijn Derammelaere

{"title":"Isotope Separator On-Line system tuning: Bayesian optimization applied to the transport beamline case","authors":"Santiago Ramos Garces , Line Le , Mia Au , Alexander Schmidt , João Pedro Ramos , Marc Dierckx , Dinko Atanasov , Ivan De Boi , Sebastian Rothe , Lucia Popescu , Stijn Derammelaere","doi":"10.1016/j.nimb.2025.165859","DOIUrl":"10.1016/j.nimb.2025.165859","url":null,"abstract":"<div><div>Optimizing Isotope Separation On-Line (ISOL) systems requires tuning to find the best values for many correlated parameters, traditionally performed by experienced operators. This process is time-consuming and often suboptimal due to the large number of parameters involved. Optimization algorithms have emerged as valuable tools to support the tuning process, although their application has primarily focused on accelerators. This paper presents experimental results on optimizing the transport beamline of the ISOLDE Offline 2 mass separator system at CERN. Instead of formulating beamline tuning as a multi-objective optimization problem, performance objectives are modeled as constraints, thereby reducing the problem to a single-objective constrained optimization. The results indicate that Bayesian optimization-based algorithms successfully identified beamline parameters that meet mass separation requirements at the specified resolution. Additionally, the findings validate the use of a Bayesian optimization algorithm with a data-informed Gaussian process, which consistently improves convergence and outperforms benchmark algorithms.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"568 ","pages":"Article 165859"},"PeriodicalIF":1.4,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099355","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