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Electronic stopping power of slow H+ and He2+ ions in CdTe from first principle

文献类型：期刊论文

作者Li, Chang-kai1,2; Mao, Fei3; Fu, Yan-long1,2; Liao, Bin1,2; Ouyang, Xiao-ping4; Zhang, Feng-Shou1,2,5
刊名NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
出版日期2017-02
卷号392页码:51-57
关键词Electronic stopping power ED-TDDFT Charge transfer Velocity proportionality
ISSN号0168-583X
DOI10.1016/j.nimb.2016.12.017
英文摘要We study through time-dependent density-functional theory (TDDFT) method the electronic stopping power of low-energy protons and helium ions moving through CdTe under the condition of channeling. The agreement between our calculated results and SRIM data roughly up to the stopping maximum for the proton along the < 1 0 0 > and < 1 1 1 > crystalline axes and for helium ions along < 1 0 0 > crystalline axis is satisfactory, which can be explained by the energy transfer mechanism that electron-hole excitation caused by ions in the solid. However, in the channel of < 1 1 1 > for helium ions, a transition between two velocities regimes is observed at about v = 0.4 a.u. This may be an indication of extra energy loss channel beyond the electron-hole excitation. To analyze it, we calculate the amount of electrons captured by the moving projectiles in real time. It is found that the soft transition between two velocities regimes can be attributed to the charge transfer and charge resonance between helium ion and host atoms of CdTe crystal, which are considered as additional energy loss channels. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词DENSITY-FUNCTIONAL THEORY ; ENERGY-LOSS ; SOLIDS ; DYNAMICS ; HELIUM ; AL ; COLLISIONS ; CLUSTERS ; HYDROGEN ; OCTOPUS
资助项目European Commissions 7th Framework Programme (FP7-PEOPLE-IRSES)[269131]
WOS研究方向Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种英语
WOS记录号WOS:000398763500009
出版者ELSEVIER SCIENCE BV
源URL[http://119.78.100.186/handle/113462/57067]  
专题中国科学院近代物理研究所
通讯作者Zhang, Feng-Shou
作者单位1.Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China
2.Beijing Radiat Ctr, Beijing 100875, Peoples R China
3.Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China
4.Northwest Inst Nucl Technol, Xian 710024, Peoples R China
5.Natl Lab Heavy Ion Accelerator Lanzhou, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Li, Chang-kai,Mao, Fei,Fu, Yan-long,et al. Electronic stopping power of slow H+ and He2+ ions in CdTe from first principle[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2017,392:51-57.
APA Li, Chang-kai,Mao, Fei,Fu, Yan-long,Liao, Bin,Ouyang, Xiao-ping,&Zhang, Feng-Shou.(2017).Electronic stopping power of slow H+ and He2+ ions in CdTe from first principle.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,392,51-57.
MLA Li, Chang-kai,et al."Electronic stopping power of slow H+ and He2+ ions in CdTe from first principle".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 392(2017):51-57.

入库方式： OAI收割

来源：近代物理研究所

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