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collision dynamics of an Energetic Carbon Ion Impinging on the Stone-Wales Defect in a Single-walled Carbon Nanotube

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Chemical Research in Chinese Universities 2016年第5期32卷 803-807页

作者： ZHANG Chao MAO Fei MENG Xiangrui PAN Chengling SHENG Shaoding School of Materials Science and Engineering Anhui University of Science and Technology Huainan 232001 P. R. China School of Energy and Safely Anhui University of Science and Technology Huainan 232001 P. R. China School of Nuclear Science and Technology University of South China Hengyang 421001 P. R. China

By employing atomistic simulations based on an empirical potential model and a self-consistent-charge density-functional tight-binding method, the collision dynamics process of an energetic carbon ion impinging on the Stone-Wales defect in a single-walled carbon nanotube was investigated. The outwardly and inwardly displacement threshold energies for the primary knock-on atom in the Stone-Wales defect were calculated to be 24.0 and 25.0 eV, respectively. The final defect configuration for each case was a 5-1DB-T（DB=dangling bond） defect formed in the front surface of the nanotube. Moreover, the minimum incident energy of the projectile prompting the primary knock-on atom displacement was predicted to be 71.0 eV, and the time evolutions of the kinetic and potential energies of the projectile and the primary knock-on atom were both plotted to analyze the energy transfer process.

关键词： Carbon nanotube collision dynamics Stone-Wales defect

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Atomic structure and collision dynamics with highly charged ions

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Chinese Physics B 2022年第9期31卷 13-40页

作者： Xinwen Ma Shaofeng Zhang Weiqiang Wen Zhongkui Huang Zhimin Hu Dalong Guo Junwen Gao Bennaceur Najjari Shenyue Xu Shuncheng Yan Ke Yao Ruitian Zhang Yong Gao Xiaolong Zhu Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou 730070China Key Laboratory of Radiation Physics and Technology of the Ministry of Education Sichuan UniversityChengdu 610064China Department of Physics Hangzhou Normal UniversityHangzhou 311121China Shanghai EBIT Laboratory Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE)Fudan UniversityShanghai 200433China

The research progresses on the investigations of atomic structure and collision dynamics with highly charged ions based on the heavy ion storage rings and electron ion beam traps in recent 20 years are *** structure part covers test of quantum electrodynamics and electron correlation in strong Coulomb field studied through dielectronic recombi-nation spectroscopy and VUV/x-ray *** collision dynamics part includes charge exchange dynamics in ion-atom collisions mainly in Bohr velocity region,ion-induced fragmentation mechanisms of molecules,hydrogen-bound and van de Waals bound clusters,interference,and phase information observed in ion-atom/molecule *** this achievements,two aspects of theoretical studies related to low energy and relativistic energy collisions are *** applications of data relevant to key atomic processes like dielectronic recombination and charge exchanges involving highly charged ions are *** the end of this review,some future prospects of research related to highly charged ions are proposed.

关键词： highly charged ion atomic structure collision dynamics quantum electrodynamics fragmentation mechanisms relativistic effects electron correlation

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Review of quantum collision dynamics in Debye plasmas

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Matter and Radiation at Extremes 2016年第5期1卷 237-248页

作者： R.K.Janev Songbin Zhang Jianguo Wang School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710119China Macedonian Academy of Sciences and Arts P.O.Box 4281000 SkopjeMacedonia Key Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsP.O.Box 8009Beijing 100088China

Hot,dense plasmas exhibit screened Coulomb interactions,resulting from the collective effects of correlated many-particle *** the lowest particle correlation order(pair-wise correlations),the interaction between charged plasma particles reduces to the DebyeeHu¨ckel(Yukawa-type)potential,characterized by the Debye screening *** to the importance of Coulomb interaction screening in dense laboratory and astrophysical plasmas,hundreds of theoretical investigations have been carried out in the past few decades on the plasma screening effects on the electronic structure of atoms and their collision processes employing the DebyeeHu¨ckel screening *** present article aims at providing a comprehensive review of the recent studies in atomic physics in Debye ***,the work on atomic electronic structure,photon excitation and ionization,electron/positron impact excitation and ionization,and excitation,ionization and charge transfer of ion-atom/ion collisions will be reviewed.

关键词： Debye plasmas Screened Coulomb potential Atomic structure collision dynamics

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