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

A Comprehensive study of the exposure and energy absorption buildup factors in some polymer composites for point isotropic Source, including the effect of bremsstrahlung 点各向同性源某些聚合物复合材料的暴露和能量吸收累积因子综合研究，包括轫致辐射的影响

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 : 2024-11-01 DOI: 10.1016/j.nimb.2024.165552

Keyhandokht Karimi-Shahri , Yasaman Rezaei Moghaddam , Parisa Akhlaghi , Najmeh Mohammadi , Atiyeh Ebrahimi-Khankook

{"title":"A Comprehensive study of the exposure and energy absorption buildup factors in some polymer composites for point isotropic Source, including the effect of bremsstrahlung","authors":"Keyhandokht Karimi-Shahri , Yasaman Rezaei Moghaddam , Parisa Akhlaghi , Najmeh Mohammadi , Atiyeh Ebrahimi-Khankook","doi":"10.1016/j.nimb.2024.165552","DOIUrl":"10.1016/j.nimb.2024.165552","url":null,"abstract":"<div><div>The exposure (EBF) and energy absorption buildup factors (EABF) of different polymer composites (SiW, PHEMA-WO<sub>3</sub>, CaWO<sub>4</sub>, EWO<sub>3</sub>, BaTiO<sub>3</sub>, PbCl<sub>2</sub>) has been investigated for photon isotropic source with the energy range of 0.015–15 MeV and the penetration depth of 1–10 mean free path(mfp). Furthermore, the contribution of bremsstrahlung effect on selected polymer composites EBF has been discussed. Simulations were performed by MCNPX Monte Carlo code. Model validation was carried out by comparing theoretical uncollided flux and EBF of water with similar published data. The results indicate that EBF and EABF values are dependent on the incident photon energy and the depth of penetration. The maximum and minimum values of EBF and EABF are related to BaTiO<sub>3</sub> and SiW, respectively. Moreover, it is observed that considering bremsstrahlung increases values, especially at energies greater than 3 MeV.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165552"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572077","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 of flux-weighted average cross-section in the photo-neutron reactions of Nb at the bremsstrahlung end-point energies of 20 MeV and 67 MeV 在轫致辐射端点能量为 20 MeV 和 67 MeV 时测量铌的光中子反应中的通量加权平均截面

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 : 2024-10-30 DOI: 10.1016/j.nimb.2024.165557

R.V. Avetisyan, A.G. Barseghyan, Yu A. Gharibyan, A.V. Gyurjinyan, H.A. Mkrtchyan, A. Yu Petrosyan, I.A. Kerobyan

引用次数: 0

Phase and composition analysis of erbium deuteride thin films prepared by magnetron reactive sputtering for proton source target 质子源靶用磁控反应溅射法制备的氘化铒薄膜的相位和成分分析

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 : 2024-10-30 DOI: 10.1016/j.nimb.2024.165558

Y. Chen, J.J. Zhu, C.Y. Zhan

引用次数: 0

Study of 3089 keV gamma-ray emission from the reaction of 12C(d, pγ1-0)13C for analytical applications 研究 12C(d,pγ1-0)13C 反应产生的 3089 keV 伽马射线辐射的分析应用

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 : 2024-10-29 DOI: 10.1016/j.nimb.2024.165549

Alireza Jokar , Hafez Taghipour Aslani

引用次数: 0

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

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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