Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms最新文献_第9页

Experimental and calculated electronic stopping force determination of 24Cr, 28Ni and 22Ti ions crossing PVC and Mylar foils in the ion energy domain of LSS theory 在 LSS 理论的离子能量域中测定 24Cr、28Ni 和 22Ti 离子穿过 PVC 和 Mylar 箔的实验和计算电子阻挡力

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 : 2024-09-13 DOI: 10.1016/j.nimb.2024.165528

A. Dib , H. Ammi , K. Boukeffoussa , M. Msimanga , C. Mtshali , M. Nkosi

{"title":"Experimental and calculated electronic stopping force determination of 24Cr, 28Ni and 22Ti ions crossing PVC and Mylar foils in the ion energy domain of LSS theory","authors":"A. Dib , H. Ammi , K. Boukeffoussa , M. Msimanga , C. Mtshali , M. Nkosi","doi":"10.1016/j.nimb.2024.165528","DOIUrl":"10.1016/j.nimb.2024.165528","url":null,"abstract":"<div><p>Energy loss measurements for heavy ions (<sup>28</sup>Ni,<sup>24</sup>Cr and <sup>22</sup>Ti) crossing thin polymeric foil such as PVC and Mylar in the energy range 0.1–0.3 MeV/n have been carried out utilizing the 6MV Tandem accelerator facility at iThemba-labs in Johannesburg (South Africa). These measurements deduced experimental stopping force data have been compared with those calculated using Lindhard, Scharff and Schiott formulation (LSS) and SRIM-2013 predictions. A large significant deviation has been observed between experimental values and those calculated by LSS formula. Based on physical postulate, we have developed a reasonably simple semi-empirical formula that takes in to account a mean residual projectile charge <span><math><mover><mrow><mi>Z</mi><mn>1</mn></mrow><mrow><mo>¯</mo></mrow></mover></math></span> and suitable <span><math><msub><mi>ξ</mi><mi>e</mi></msub></math></span> factor which depend on Z1 and Z2. This new modified LSS formula has been tested and the calculated stopping force values generated by this formula are in close agreement with the measured ones.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165528"},"PeriodicalIF":1.4,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230058","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

First-principles study of Re in BCC-Mo: Diffusion behavior and interaction with point defects BCC-Mo 中 Re 的第一性原理研究：扩散行为及与点缺陷的相互作用

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 : 2024-09-11 DOI: 10.1016/j.nimb.2024.165525

Li-Xia Jia , Jin-Li Cao , Yan-Kun Dou , Yong-Peng Zhao , Dong-Jie Wang , Xin-Fu He , Wen Yang

{"title":"First-principles study of Re in BCC-Mo: Diffusion behavior and interaction with point defects","authors":"Li-Xia Jia , Jin-Li Cao , Yan-Kun Dou , Yong-Peng Zhao , Dong-Jie Wang , Xin-Fu He , Wen Yang","doi":"10.1016/j.nimb.2024.165525","DOIUrl":"10.1016/j.nimb.2024.165525","url":null,"abstract":"<div><p>Due to their some beneficial properties, molybdenum-based alloys, such as Mo-Re alloys, are recognized as potential structural materials for nuclear power reactors. Irradiation induced precipitation of rhenium (Re) atoms causes hardening and embrittlement of Mo-Re alloys, restricting their application. The interaction of rhenium (Re) atoms with point defects (PDs), as well as the diffusion behavior of Re atoms in BCC-Mo (Body Center Cubic-molybdenum), were investigated using first-principles methods. The results revealed that Re atoms exhibited high binding energies with both vacancy (Vac) and interstitial dumbbells. Furthermore, the binding energies increased with the number of Re atoms. The binding energies of Re with self-interstitial dumbbell (SIA, ie., Mo-Mo) and mixed interstitial dumbbell (Mo-Re) were quite close to. Due to the high exchange barrier between Vac and Re, the diffusion of rhenium through the vacancy-drag mechanism was difficult. Due to the low migration and rotation barrier of Mo-Re mixed interstitial dumbbell, the diffusion of Re atoms in Mo was dominated by the interstitial-mediated mechanism. From the perspective of diffusion dynamics, only interstitial dumbbells can promote the aggregation of Re atoms. By comparing the binding energy of interstitial dumbbell with interstitial dumbbell and interstitial dumbbell with Re atoms, pairs of Mo-Re interstitial dumbbell was suggested to be the nucleation sites to attract more interstitial dumbbells, thereby promoting the precipitation of Re clusters. It was because they had high binding energy and were difficult to decompose once combined.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165525"},"PeriodicalIF":1.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168637","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

Experimental investigation on UV light output of YPO4:Gd particles for ion beam induced fluorescence microscopy 用于离子束诱导荧光显微镜的 YPO4:Gd 粒子紫外光输出实验研究

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 : 2024-09-11 DOI: 10.1016/j.nimb.2024.165518

Yohei Kikuchi , Shigeo Matsuyama , Shun Kawamura , Fumito Fujishiro , Misako Miwa , Sho Toyama

引用次数: 0

Coupled effects of electronic and nuclear energy deposition in UO2 crystals: A high-resolution XRD study carried out at the MARS beamline of the SOLEIL synchrotron facility 二氧化铀晶体中电子和核能沉积的耦合效应：在 SOLEIL 同步辐射设施的 MARS 光束线进行的高分辨率 XRD 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 : 2024-09-11 DOI: 10.1016/j.nimb.2024.165491

Gaëlle Gutierrez , Alexandre Boulle , Denis Menut , Arthur Georgesco , Claire Onofri , Jean-Luc Béchade , Aurélien Debelle

{"title":"Coupled effects of electronic and nuclear energy deposition in UO2 crystals: A high-resolution XRD study carried out at the MARS beamline of the SOLEIL synchrotron facility","authors":"Gaëlle Gutierrez , Alexandre Boulle , Denis Menut , Arthur Georgesco , Claire Onofri , Jean-Luc Béchade , Aurélien Debelle","doi":"10.1016/j.nimb.2024.165491","DOIUrl":"10.1016/j.nimb.2024.165491","url":null,"abstract":"<div><p>For the first time at the SOLEIL synchrotron facility’s MARS beamline, UO<sub>2</sub> single-crystal-like samples underwent characterization, and strain depth profiles were established. Single crystals oriented along (110) and (111) were submitted to ion irradiation in the nuclear energy-loss regime (S<sub>n</sub>) using 900 keV I<sup>2+</sup> ions, and also with concomitant electronic energy deposition (S<sub>e</sub>) using 27 MeV Fe<sup>9+</sup> ions. X-ray diffraction measurements were conducted at the MARS beamline, specialized for radioactive material analysis. High-angular-resolution reciprocal space maps around asymmetrical reflections and conventional symmetrical θ/2θ scans were recorded. Analysis with the RaDMaX software allowed retrieving the strain depth profiles. Results reveal that the S<sub>n</sub>-irradiated surface layer exhibits tensile strain along its normal with no in-plane strain, that this normal strain is partially relaxed by S<sub>e</sub>. Both crystal orientations display similar behavior, but not with the same magnitude. Comparison with polycrystals indicates a more pronounced strain relaxation in the latter case.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165491"},"PeriodicalIF":1.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168624","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

Determination of electron screening potential of 6Li(p, α)3He reaction using Multi Layer Perceptron based neural network 利用基于多层感知器的神经网络确定 6Li(p,α)3He反应的电子屏蔽势

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 : 2024-09-11 DOI: 10.1016/j.nimb.2024.165529

D. Chattopadhyay

{"title":"Determination of electron screening potential of 6Li(p, α)3He reaction using Multi Layer Perceptron based neural network","authors":"D. Chattopadhyay","doi":"10.1016/j.nimb.2024.165529","DOIUrl":"10.1016/j.nimb.2024.165529","url":null,"abstract":"<div><p>Understanding nuclear reactions between light-charged nuclei in the sub-Coulomb energy region is crucial for several astrophysical processes. Accurate determination of the reaction cross-section within the astrophysically important Gamow range is challenging due to electron screening. Various methods, including polynomial fits, R-Matrix, and the indirect Trojan Horse Method (THM), have estimated electron screening energies that exceed the adiabatic limit. This study aims to derive the bare astrophysical S-factor for the reaction <span><math><mrow><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup><mtext>Li</mtext><msup><mrow><mrow><mo>(</mo><mtext>p</mtext><mo>,</mo><mi>α</mi><mo>)</mo></mrow></mrow><mrow><mn>3</mn></mrow></msup><mtext>He</mtext></mrow></math></span> and to extract electron screening energies using Multi-Layer Perceptron-based Artificial Neural Network (ANN) analysis. Experimental S-factors for <span><math><mrow><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup><mtext>Li</mtext><msup><mrow><mrow><mo>(</mo><mtext>p</mtext><mo>,</mo><mi>α</mi><mo>)</mo></mrow></mrow><mrow><mn>3</mn></mrow></msup><mtext>He</mtext></mrow></math></span>, obtained from the literature, are reanalyzed with the ANN algorithm to determine the energy-dependent S-factor. The bare astrophysical S-factor is calculated from data above 60 keV, where electron screening is negligible. The electron screening potential is then derived by comparing the shielded S-factor with the bare S-factor. The ANN-based analysis yields an electron screening potential of 220 eV, suggesting that ANN could be a viable tool for estimating electron screening potentials in light nuclei reactions.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165529"},"PeriodicalIF":1.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168638","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}

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Energy-loss process in Ni63 betavoltaic batteries 镍63光伏电池的能量损失过程

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 : 2024-09-10 DOI: 10.1016/j.nimb.2024.165526

I. Daouali, A. Belghachi, B. Amiri

引用次数: 0

A tutorial on the micro-trench technique for incident ion angle, material erosion, and impurity deposition measurements at plasma-facing surfaces 入射离子角、材料侵蚀和等离子表面杂质沉积测量的微沟槽技术教程

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 : 2024-09-04 DOI: 10.1016/j.nimb.2024.165510

S. Abe , C.H Skinner , B.E. Koel

{"title":"A tutorial on the micro-trench technique for incident ion angle, material erosion, and impurity deposition measurements at plasma-facing surfaces","authors":"S. Abe , C.H Skinner , B.E. Koel","doi":"10.1016/j.nimb.2024.165510","DOIUrl":"10.1016/j.nimb.2024.165510","url":null,"abstract":"<div><p>The micro-trench method is a new technique to measure polar and azimuthal incident ion angles, material erosion, and impurity deposition at plasma-facing surfaces, and has been applied in the DIII-D divertor. This article gives a tutorial of the micro-trench technique consisting of six steps: (1) micro-trench fabrication, (2) pre-exposure measurement of the fabricated micro-trench geometry, (3) tracer material deposition, (4) plasma exposure, (5) post-exposure observation of the tracer material, and (6) post-exposure measurement of the micro-trench geometry. Two criteria need to be satisfied to apply the micro-trench method successfully: (i) uniform impurity deposition on the micro-trench floor, and (ii) erosion dominated by the physical sputtering induced by the impinging ions. When those two criteria are satisfied, post-exposure analysis of the impurity deposition patterns on the micro-trench floor may be used to determine the polar and azimuthal incident ion directions (mean values of the ion angle directions), erosion rate, and impurity deposition rate during plasma exposure without computational interpretation.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165510"},"PeriodicalIF":1.4,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137098","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

Differential cross–section measurements for 3He-induced reactions and elastic scattering on 12C 12C 上 3He 诱导反应和弹性散射的差分截面测量结果

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 : 2024-09-03 DOI: 10.1016/j.nimb.2024.165517

F. Maragkos , V. Foteinou , H.-W. Becker , M. Kokkoris , M. Mayer , G. Provatas , D. Rogalla

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Nanostructuring by ion beams – Preface 离子束的纳米结构 - 前言

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 : 2024-09-02 DOI: 10.1016/j.nimb.2024.165487

引用次数: 0

Characterization of mineral composition using PIXE and EXAFS analyses to elucidate the Barium adsorption mechanism 利用 PIXE 和 EXAFS 分析确定矿物成分的特征，以阐明钡的吸附机制

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 : 2024-08-30 DOI: 10.1016/j.nimb.2024.165516

Kaori Oguri , Naoto Hagura , Akiko Yamaguchi , Masahiko Okumura , Haruaki Matsuura , Yasumichi Tsunashima , Katsumi Aoki , Yoichi Arai , Sou Watanabe

{"title":"Characterization of mineral composition using PIXE and EXAFS analyses to elucidate the Barium adsorption mechanism","authors":"Kaori Oguri , Naoto Hagura , Akiko Yamaguchi , Masahiko Okumura , Haruaki Matsuura , Yasumichi Tsunashima , Katsumi Aoki , Yoichi Arai , Sou Watanabe","doi":"10.1016/j.nimb.2024.165516","DOIUrl":"10.1016/j.nimb.2024.165516","url":null,"abstract":"<div><p>Ningyo-toge is a uranium (U) mine that was operative in Japan. Currently, the mining area retains a dump of mill tailings. Groundwater is contaminated with U ore, and mill tailings might contain radioactive elements, such as U and radium (Ra), which can negatively impact the human body. This study determined the soil composition at the tailings dumping site using particle-induced X-ray emission, scanning electron microscopy, and X-ray diffraction and observed the adsorption structure of barium (Ba), an analog of Ra, using X-ray absorption fine structure analysis. The results revealed the existence of silicate minerals, such as quartz and mica, and metal oxides, such as Fe and Mn, in the soil. Ningyo-toge soil is similar to montmorillonite and bentonite. In particular, it was proposed that the adsorption of Ba on Mn oxide is an inner-sphere complex that immobilizes Ba. These findings will provide valuable information for estimating the behavior of Ra in the environment. The results of this study will be helpful for safety assessment and evaluating the impacts on the surrounding environment.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165516"},"PeriodicalIF":1.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097072","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