Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms最新文献_第7页

Experimental assessment and analysis of calculations accuracy for the neutron-induced radio-isotopes in copper parts of radiotherapy accelerators 放疗加速器铜部件中的中子诱导放射性同位素计算精度的实验评估与分析

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 : 2024-10-29 DOI: 10.1016/j.nimb.2024.165553

V. Blideanu , R. Behal , C. Besnard-Vauterin , V. Glagolev , X. Ledoux , J. Mrazek , B. Rapp , E. Simeckova

{"title":"Experimental assessment and analysis of calculations accuracy for the neutron-induced radio-isotopes in copper parts of radiotherapy accelerators","authors":"V. Blideanu , R. Behal , C. Besnard-Vauterin , V. Glagolev , X. Ledoux , J. Mrazek , B. Rapp , E. Simeckova","doi":"10.1016/j.nimb.2024.165553","DOIUrl":"10.1016/j.nimb.2024.165553","url":null,"abstract":"<div><div>Induced radioactivity in particle accelerators is currently not sufficiently addressed, particularly for radiotherapy electron LINACs when the activation occurs via secondary neutrons created in photo-nuclear reactions.</div><div>Methodologies based on Monte-Carlo simulations coupled with activation calculation codes are often used to address this issue. Their accuracy, which is potentially affected by the limited capabilities of the calculation tools to simulate nuclear reactions at the origin of the materials activation, can be deeply analyzed only through comparisons with experimental values but the latter are not widely available.</div><div>New macroscopic data for the activity induced by neutrons in the materials commonly present in medical electron LINACs are presented. Neutron-induced activation has been measured by sample irradiation at SPIRAL2/NFS facility in accurately characterized configurations. Experimental results were compared to the simulations predictions allowing to assess the precision that can be achieved by a fully simulation-based methodology, mainly related to the energy-dependent reaction cross-sections.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165553"},"PeriodicalIF":1.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537431","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

Elastic recoil and scattering yields measured in low energy heavy ion ERD 在低能重离子ERD中测量的弹性反冲和散射当量

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 : 2024-10-29 DOI: 10.1016/j.nimb.2024.165542

Mikko Kivekäs , Kenichiro Mizohata , Jaakko Julin , Markku Kainlauri , Mika Prunnila , Laura Keränen , Matti Putkonen , Tatu Korkiamäki , Mikko Laitinen

{"title":"Elastic recoil and scattering yields measured in low energy heavy ion ERD","authors":"Mikko Kivekäs , Kenichiro Mizohata , Jaakko Julin , Markku Kainlauri , Mika Prunnila , Laura Keränen , Matti Putkonen , Tatu Korkiamäki , Mikko Laitinen","doi":"10.1016/j.nimb.2024.165542","DOIUrl":"10.1016/j.nimb.2024.165542","url":null,"abstract":"<div><div>Experimental yields of low energy recoils and scattered beams in ToF-ERD have been measured and compared against theory. A significant discrepancy between Rutherford or Andersen cross-section predicted yield vs the experimental results is now demonstrated. Scale of the discrepancy is up to 50% compared to yields predicted by theory for low energy Au recoils. MCERD simulations were used to study the carbon foil scattering in the timing detectors to explain the observed discrepancy. Simulations indicate that a major part of the discrepancy occurs due to the scattering of low energy, heavy mass particles in the timing detector foils. The yield discrepancy can be narrowed down by taking into account the reduction of recoil yields caused by the carbon foil scattering. Further studies are in progress to study carbon foil scattering, aiming to further improve the quantitativity of ToF-ERD for the heavy elements.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165542"},"PeriodicalIF":1.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537430","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}

引用次数: 0

Validation of crystal surface scattering method for downsizing accelerator mass spectrometry 验证用于缩小加速器质谱的晶体表面散射法

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 : 2024-10-25 DOI: 10.1016/j.nimb.2024.165545

Satoshi Jinno , Akihiro Matsubara , Natsuko Fujita , Kenji Kimura

引用次数: 0

ESR spectroscopic analysis of fructose as a dosimeter for gamma radiation 作为伽马辐射剂量计的果糖 ESR 光谱分析

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 : 2024-10-24 DOI: 10.1016/j.nimb.2024.165551

Arif Rachmanto , Marrisa Arlinkha Ega Putri , Muhamad Yasin Yunus , Ade Lestari Yunus , Rizka Fitriana , Rahmawati Rahmawati

{"title":"ESR spectroscopic analysis of fructose as a dosimeter for gamma radiation","authors":"Arif Rachmanto , Marrisa Arlinkha Ega Putri , Muhamad Yasin Yunus , Ade Lestari Yunus , Rizka Fitriana , Rahmawati Rahmawati","doi":"10.1016/j.nimb.2024.165551","DOIUrl":"10.1016/j.nimb.2024.165551","url":null,"abstract":"<div><div>In this research, fructose was used as a dosimeter, and ESR examined the influence of radiation dose on the dosimeter’s properties. Microwave power, g-value, and decay of response tests were carried out at doses of 1, 5, and 10 kGy. The results show that fructose possesses linearity at doses of 5 × 10<sup>−2</sup>–30 kGy. The radiation detection sensitivity of fructose is better than sucrose’s but less than alanine’s over the entire dose range. The irradiation dose influences microwave saturation on ESR intensity, occurring at 5 and 10 kGy. The microwave power for irradiated fructose ranges from 1.00 to 2.46 mW. The ESR signal intensity increases with higher radiation doses, primarily due to the formation of more free radicals. Additionally, higher radiation doses lead to faster decay of the fructose dosimeter’s response. The fructose ESR intensity stability compared to alanine and sucrose at 1, 5, and 10 kGy are alanine > sucrose > fructose, alanine > fructose > sucrose, and alanine > fructose ≈ sucrose, respectively.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165551"},"PeriodicalIF":1.4,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536122","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

Tracing of low-energy protons implanted in different Si crystal orientations by keV recoil detection in transmission geometry 通过透射几何中的 keV 反冲探测追踪植入不同硅晶体取向的低能质子

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 : 2024-10-22 DOI: 10.1016/j.nimb.2024.165546

R. Holeňák , E. Ntemou , M. Kokkoris , S. Petrović , D. Primetzhofer

引用次数: 0

Study on fragmentation dynamics of NH32+ induced by electron impact 电子撞击诱导的 NH32+ 碎片动力学研究

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 : 2024-10-22 DOI: 10.1016/j.nimb.2024.165547

Yingying Wang, Yutian Li, Yang Gao, Yiming Chen, Zhanrong Zhou, Xiaofang Shen, Guofeng Jin

引用次数: 0

Measurements of displacement cross sections of metals for 120-GeV proton beam irradiation 测量 120-GeV 质子束辐照下金属的位移截面

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 : 2024-10-16 DOI: 10.1016/j.nimb.2024.165543

Yosuke Iwamoto , Hiroki Matsuda , Shin-ichiro Meigo , Katsuya Yonehara , Frederique Pellemoine , Zunping Liu , Kevin Lynch , Makoto Yoshida , Atsushi Yabuuchi , Toshimasa Yoshiie , Shintaro Hashimoto

{"title":"Measurements of displacement cross sections of metals for 120-GeV proton beam irradiation","authors":"Yosuke Iwamoto , Hiroki Matsuda , Shin-ichiro Meigo , Katsuya Yonehara , Frederique Pellemoine , Zunping Liu , Kevin Lynch , Makoto Yoshida , Atsushi Yabuuchi , Toshimasa Yoshiie , Shintaro Hashimoto","doi":"10.1016/j.nimb.2024.165543","DOIUrl":"10.1016/j.nimb.2024.165543","url":null,"abstract":"<div><div>The number of displacements per atom (dpa) is widely used as an indicator of irradiation damage of materials in proton accelerator facilities. Experiments have been carried out to validate the dpa of metallic materials for protons with energies below 3 GeV. However, measurements of the displacement cross-sections for high-energy protons above 3 GeV have not been carried out and the calculations have not been validated. To validate the displacement cross section of metals in high-energy region, electrical resistivity changes in wires of aluminum, copper and tungsten at 8 K were measured using protons with energies of 120-GeV. The results show that the Norgett-Robinson-Torrens dpa model of the Particle and Heavy Ion Transport Calculation Code overestimates the experimental data. On the other hand, the calculated results using the athermal recombination corrected dpa model were in agreement with the measured displacement cross sections. In the proton energy region above 1 GeV, the displacement cross section is almost constant, which is due to the fact that the damage energy of the material under 1 GeV proton irradiation is almost the same as under 120 GeV proton irradiation. Damage recovery of defects accumulated in the sample was also measured using isochronal annealing: At 80 K, approximately 60 % and 80 % of the damage remains for copper and tungsten, respectively. These results are the same as those obtained from other experiments on proton and neutron irradiation.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165543"},"PeriodicalIF":1.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441437","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}

引用次数: 0

Ion beam microprobe analysis for friction-induced material transfer processes in ta-C/steel and ta-C/brass pairs 对 ta-C/steel 和 ta-C/brass 成对材料的摩擦诱导转移过程进行离子束微探针分析

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 : 2024-10-11 DOI: 10.1016/j.nimb.2024.165540

Frans Munnik , Lars Lorenz , Fabian Härtwig , Stefan Makowski , Matthias Krause

引用次数: 0

The JANNuS-Saclay platform: New developments for the understanding of evolutions under irradiation in materials JANNuS-Saclay 平台：了解材料在辐照下演变的新进展

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 : 2024-10-05 DOI: 10.1016/j.nimb.2024.165541

G. Gutierrez, C. Bernard, P. Billaud, D. Bossu, T. Cloutier, M. Loyer-Prost, H. Martin, E. Meslin, F. Nozais, B. Ridard, G. Sagnes, J.-L. Bechade

引用次数: 0

Preliminary beam formations after the upgrade of the TIARA two microbeam systems TIARA 双微型光束系统升级后的初步光束形成

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 : 2024-10-03 DOI: 10.1016/j.nimb.2024.165539

Y. Ishii , R. Yamagata , T. Satoh , S. Matsuyama , T. Kamiya , S. Onoda

{"title":"Preliminary beam formations after the upgrade of the TIARA two microbeam systems","authors":"Y. Ishii , R. Yamagata , T. Satoh , S. Matsuyama , T. Kamiya , S. Onoda","doi":"10.1016/j.nimb.2024.165539","DOIUrl":"10.1016/j.nimb.2024.165539","url":null,"abstract":"<div><div>This paper presents a comprehensive study on the enhancements made to the heavy-ion microbeam (H-MB) and light-ion microbeam (L-MB) systems at the Takasaki Institute for Advanced Quantum Science, part of the National Institutes for Quantum Science and Technology (QST), and their implications for future research in ion microbeam technology. Our work addresses the critical need for submicron beam sizes in advanced ion microbeam applications, a challenge previously unmet due to limitations in the original system designs and aging components. The manuscript details the extensive upgrades undertaken for both the H-MB and L-MB systems, including the implementation of new quadruple magnets, refined demagnification strategies, and advanced control systems, culminating in the successful formation of submicron ion beams. The meticulous alignment procedures for both the H-MB and L-MB have enabled precise ion beam focusing. The current beam sizes have been measured at 1.0 × 1.1 µm<sup>2</sup> with a beam current of approximately 10 pA for the H-MB, and 500 × 600 nm<sup>2</sup> with a beam current of approximately 50 pA for the L-MB at a 3 MeV H<sup>+</sup> beam.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165539"},"PeriodicalIF":1.4,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425227","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