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

{"title":"Baseline measurements in the assessment of ESS-specific radionuclide uptake by crops cultivated in Southern Sweden","authors":"R.J.W. Frost ,&nbsp;E. Hermansson ,&nbsp;G. Nagy ,&nbsp;G. Pédehontaa-Hiaa ,&nbsp;P. Pongrac ,&nbsp;C.L. Rääf ,&nbsp;C. Bernhardsson","doi":"10.1016/j.nimb.2024.165514","DOIUrl":"10.1016/j.nimb.2024.165514","url":null,"abstract":"<div><p>The European Spallation Source, ESS, is a neutron research facility under construction in Lund, Southern Sweden. The Facility will produce neutrons by spallation, using a powerful linear accelerator to deliver protons to a tungsten target. In addition to the desired neutron production, a long list of radionuclides will be created as by-products of the nuclear reaction inside the target. The Swedish Radiation Safety Authority has established a list of the most relevant radionuclides, in terms of contribution to the effective dose to ESS workers and the general public, should an accidental release of irradiated target material occur. This list includes radionuclides that are not produced by the nuclear energy industry, in particular ^178mHf, ¹⁸²Ta, ¹⁸⁷W, ¹⁴⁸Gd and ¹⁷³Lu. Ongoing research efforts aim to determine the best analytical methods to assess these exotic and often difficult-to-measure radionuclides in environmental samples. This work investigates the potential of X-ray fluorescence and time-of-flight elastic Recoil detection analysis for the assessment of soil samples, and the potential of particle induced X-ray emission for the assessment of crop samples. These techniques require only simple sample preparation steps and no chemical extraction, unlike the conventional environmental monitoring methods such as inductively-coupled plasma mass spectrometry, and show promise as complimentary methods enabling fast sample throughput. This study focuses on the analysis of uncontaminated soil and crops, to provide baseline data, whilst simultaneously assessing the available measurement capabilities. For the X-ray fluorescence system used in this study, the method detection limit for W in soil was determined to be 0.147<!--> <!-->ppth, and Zr which can be correlated with the migration of Hf was clearly measurable.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165514"},"PeriodicalIF":1.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0168583X24002842/pdfft?md5=76d06d7e326dab0daeafeeba89a7368d&pid=1-s2.0-S0168583X24002842-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097073","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}

{"title":"Innovative nano-shielding for minimizing stray radiation dose in external radiation therapy: A promising approach to enhance patient safety","authors":"Saeed Rajabpour ,&nbsp;Ghada Almisned ,&nbsp;H.O. Tekin ,&nbsp;Asghar Mesbahi","doi":"10.1016/j.nimb.2024.165513","DOIUrl":"10.1016/j.nimb.2024.165513","url":null,"abstract":"<div><p>This study investigates the effectiveness of novel nanocomposite shielding materials in reducing out-of-field radiation doses during radiation therapy, employing Geant4 Monte Carlo (MC) simulations alongside an anthropomorphic female phantom. The research focuses on two radiation modalities: 6 MV beams with and without flattening filters. Utilizing the Geant4 MC code, detailed simulations of a Varian Clinac 2100C/D linear accelerator and an ICRP-145 mesh-type human phantom were conducted to estimate the doses to out-of-field organs from unintended secondary radiation. This involved simulating a comprehensive linac model, including all relevant beam-line components, and assessing the shielding effects of three different nanocomposites doped with metal nanoparticles at various thicknesses. The nanocomposites, comprising Polytetrafluoroethylene (PTFE), with PtO₂, IrO₂, and Bi₂O₃ nanoparticles, were evaluated for their potential to reduce patient organ doses from stray photon doses. The results showed that these materials could significantly lower radiation exposure to non-target tissues.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165513"},"PeriodicalIF":1.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097071","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}

{"title":"Geant4 simulations for the γ-ray detectors of gSPEC at GSI/FAIR","authors":"V. Piau ,&nbsp;R. Lozeva ,&nbsp;H. Ramarijaona ,&nbsp;I. Kojouharov ,&nbsp;G. Duchêne ,&nbsp;J. Gerl ,&nbsp;M. Górska ,&nbsp;A. Blot ,&nbsp;E. Guérard ,&nbsp;M. Filliger ,&nbsp;P. Herrmann ,&nbsp;P. Rosier ,&nbsp;M.-H. Sigward","doi":"10.1016/j.nimb.2024.165505","DOIUrl":"10.1016/j.nimb.2024.165505","url":null,"abstract":"<div><p>A design study for the <span><math><mi>γ</mi></math></span>-ray detector array of the gSPEC project, which aims at measuring nuclear moments at GSI/FAIR, is presented. Foreseen setups, involving DEGAS and the new gDEGAS triple cluster detectors for <span><math><mi>γ</mi></math></span>-ray spectroscopy are simulated using the Geant4 framework. The main characteristics associated to these detector assemblies with the envisaged configurations, namely the photo-peak efficiency and the angular resolution, are discussed. A new correction procedure for a better reconstruction of the time-perturbed angular distribution is proposed.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165505"},"PeriodicalIF":1.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142096278","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}

{"title":"Using X-ray absorption near edge structure to evaluate adsorption properties of rare earths and nitrogen by difference of their interactions","authors":"Kazuki Minowa ,&nbsp;Sou Watanabe ,&nbsp;Masahiko Nakase ,&nbsp;Youko Takahatake ,&nbsp;Yasunori Miyazaki ,&nbsp;Yasutoshi Ban ,&nbsp;Haruaki Matsuura","doi":"10.1016/j.nimb.2024.165496","DOIUrl":"10.1016/j.nimb.2024.165496","url":null,"abstract":"<div><p>In this study, X-ray absorption near edge structure (XANES) spectral analysis and column experiments were used to verify the selectivity of rare earth (RE) ions by alkyl diamide amine (ADAAM) adsorbent. In addition, the interactions between the N atoms of ADAAM and RE ions were evaluated to determine whether any of the RE ions are a valid simulant for developing a mutual separation process for minor actinides (MAs) in highly radioactive liquid waste. It was confirmed that La and Ce interacted with the amine N atom of ADAAM and they showed a peak shift of the N-K edge XANES spectrum; this finding suggested that a soft interaction is an essential factor influencing ion selectivity. Therefore, the selection factor of RE ions by ADAAM adsorbent was similar to that of MAs. It was concluded that RE ions are reasonable species to simulate MAs.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165496"},"PeriodicalIF":1.4,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0168583X24002660/pdfft?md5=8654c2cc488e7065ce759b504c75b2e4&pid=1-s2.0-S0168583X24002660-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089740","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}

{"title":"Multiply-charged argon ion irradiation of microfabricated niobium wires","authors":"Bernardo Langa Jr. ,&nbsp;Ivan Lainez ,&nbsp;Margaret Marte ,&nbsp;Patrick Johnson ,&nbsp;Neil Mehta ,&nbsp;Dhruva Kulkarni ,&nbsp;Mohan Ghimire ,&nbsp;Dale Hensley ,&nbsp;Bernadeta Srijanto ,&nbsp;Chad Sosolik ,&nbsp;Kasra Sardashti","doi":"10.1016/j.nimb.2024.165511","DOIUrl":"10.1016/j.nimb.2024.165511","url":null,"abstract":"<div><p>While rare on Earth, multiply-charged ions (MCIs) are abundant species in outer space. For spacecraft outside the Earth’s atmosphere, MCIs are some of the main contributors to the failure of electronic devices. While the detrimental effects of MCIs on space electronics have been known for quite some time, the underlying physics of their interactions, which are tied to the coupling of both electronic and lattice degrees of freedom, are complex and remain relatively unexplored. The impacts of MCIs on superconducting electronics used for detection and communication in outer space are particularly unknown. Here, we aim to shed light on such interactions by examining the effect of low- to medium-dose Ar⁸⁺ irradiation on the physical characteristics (e.g., surface topography, electrical transport) of microfabricated niobium (Nb) wires.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165511"},"PeriodicalIF":1.4,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142077235","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}

{"title":"Multiple scattering of 855 MeV electrons in amorphous and crystalline silicon: Simulations versus experiment","authors":"Germán Rojas-Lorenzo ,&nbsp;Jesús Rubayo-Soneira ,&nbsp;Maykel Márquez-Mijares ,&nbsp;Andrei V. Korol ,&nbsp;Andrey V. Solov’yov","doi":"10.1016/j.nimb.2024.165515","DOIUrl":"10.1016/j.nimb.2024.165515","url":null,"abstract":"<div><p>The angular distribution function of multiple scattering experienced by <span><math><mrow><mn>855</mn><mspace></mspace><mtext>MeV</mtext></mrow></math></span> electrons passing through an amorphous silicon plate and an oriented silicon crystal has been studied by means of relativistic molecular dynamics simulations using two types of the potentials that describe electron–atom interaction. The differences in the angular distributions of the beam particles in both media are analyzed. The results obtained are compared to the experimental data and to the results of Monte Carlo simulations.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165515"},"PeriodicalIF":1.4,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142077234","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}

{"title":"Design and commissioning of the ISOL beamline at the RAON facility","authors":"T. Hashimoto ,&nbsp;H.J. Yim ,&nbsp;J.H. Kim ,&nbsp;Y.-H. Park ,&nbsp;S. Heo ,&nbsp;K.H. Yoo ,&nbsp;C.C. Yun ,&nbsp;H. Ishiyama ,&nbsp;J.H. Lee","doi":"10.1016/j.nimb.2024.165504","DOIUrl":"10.1016/j.nimb.2024.165504","url":null,"abstract":"<div><p>The Rare isotope Accelerator complex for ON-line experiment (RAON) located at the Daejeon site of the Institute for Basic Science (IBS) is the first Radioactive Isotope (RI) beam facility in Korea. The RAON facility employs an in-flight method using RI beams produced using an Isotope Separator On-Line (ISOL) method to explore unstable nuclei in uncharted regions. A high-power ISOL facility is critical for providing the required high-quality, intense RI beams. The design, construction, and installation of the ISOL system have been completed, and the beam transport line commissioning with stable isotope beams has been conducted. As a result, all requirements, such as the transmission and the mass-resolving power, for the beamlines were satisfied, and the beams from the Target Ion Source (TIS) were transported to the end of the ISOL beamline, which is the entrance to the superconducting linear accelerator system. The ISOL beamline is now ready for the transport of RI beams.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165504"},"PeriodicalIF":1.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040228","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}

{"title":"Computational insights from the thermal spike model into mesoporous silica behavior during swift heavy ion irradiation","authors":"Jun Lin ,&nbsp;Clara Grygiel ,&nbsp;Christian Dufour ,&nbsp;Xavier Deschanels","doi":"10.1016/j.nimb.2024.165512","DOIUrl":"10.1016/j.nimb.2024.165512","url":null,"abstract":"<div><p>Mesoporous silica materials are pivotal in various scientific domains due to their unique properties and versatile applications. However, understanding their response to irradiation, particularly from Swift Heavy Ions (SHI), remains limited. We address this gap by investigating experimental mesoporous silica behavior under 12 MeV Carbon and 92 MeV Xenon bombardment using the Three-Dimensional Thermal Spike Model (3DTS) simulation. Our computational simulations reveal localized heating effects and provide mechanistic insights into experimental observations, shedding light on pore closure and different observed damage patterns. This study is the first application of this model to porous silica and deepens our knowledge of the mechanism of structural evolution under ion bombardment.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165512"},"PeriodicalIF":1.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040229","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}

{"title":"Picosecond pulsed beams of light and heavy keV ions at the Time-of-Flight Medium energy ion scattering system at Uppsala University","authors":"Eleni Ntemou ,&nbsp;Radek Holeňák ,&nbsp;Dan Wessman ,&nbsp;Daniel Primetzhofer","doi":"10.1016/j.nimb.2024.165494","DOIUrl":"10.1016/j.nimb.2024.165494","url":null,"abstract":"<div><p>A 16 MHz electrostatic beam chopper is implemented at the Uppsala University ToF-MEIS system to complement the 4 MHz sinusoidal scanning, refining the resolution without drift-tube bunching. The system is benchmarked with H₂⁺, He⁺, and Ne⁺ ions in transmission and backscattering geometries. The estimated true pulse duration for 60 keV He⁺ is 34 ps while the direct beam impinging on the detector resulted in measured pulse widths of 295 ps for He ions and 481 ps for Ne ions. In backscattering geometries, ions impinging on the target yield measured pulse durations of 459 ns for H ions, 550 ps for He ions and 810 ps for Ne ions and lead to energy resolution measurements of 2.4 keV (100 keV H), 0.9 keV (60 keV He), and 2.4 keV (160 keV Ne). Discussions cover straggling effects on achievable energy resolution and how to obtain estimates of the true duration of the ion pulse.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165494"},"PeriodicalIF":1.4,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0168583X24002647/pdfft?md5=dda508ac230befa5602941d390563d0d&pid=1-s2.0-S0168583X24002647-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011492","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}

{"title":"Differential cross-section measurement for 10B(p, αγ1)7Be, 10B(p, p’γ1)10B and 11B(p, p’γ1) 11B reactions","authors":"Hafez Taghipour Aslani ,&nbsp;Alireza Jokar ,&nbsp;Ali Akbar Mehmandoost-Khajeh-Dad ,&nbsp;Hossien Rafi-Kheiri","doi":"10.1016/j.nimb.2024.165509","DOIUrl":"10.1016/j.nimb.2024.165509","url":null,"abstract":"<div><p>Differential cross-sections of the ¹⁰B(p, αγ₁)⁷Be (E_γ = 429 keV), ¹⁰B(p, p’γ₁)¹⁰B (E_γ = 718 keV) and ¹¹B(p, p’γ₁) ¹¹B (E_γ = 2124 keV) reactions have been measured at proton laboratory energies of 912–2776 keV at 90^°. The proton beam impinged on a thin ^natB₂O₃ film evaporated onto a self-supporting thin carbon layer. The incident energies were increased by 10 (20) keV steps in the resonance (off-resonance) regions. Our data are compared with the existing ones from literature. A benchmark procedure was performed by comparing the calculated thick-target yields from the current differential cross-sections with the existing measured thick target gamma-ray yields. The overall systematic uncertainty of the cross-sections was estimated to be about 10 %, mainly related to the target thickness determination.</p></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"556 ","pages":"Article 165509"},"PeriodicalIF":1.4,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141992653","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}