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

doi:10.1016/j.nimb.2016.12.017

	Electronic stopping power of slow H+ and He2+ ions in CdTe from first principle
	Li, Chang-kai 1,2; Mao, Fei 3; Fu, Yan-long 1,2; Liao, Bin 1,2; Ouyang, Xiao-ping 4; Zhang, Feng-Shou 1,2,5
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
	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
DOI	10.1016/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.
资助项目	European Commissions 7th Framework Programme (FP7-PEOPLE-IRSES)[269131]
WOS关键词	DENSITY-FUNCTIONAL THEORY ; ENERGY-LOSS ; SOLIDS ; DYNAMICS ; HELIUM ; AL ; COLLISIONS ; CLUSTERS ; HYDROGEN ; OCTOPUS
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000398763500009
内容类型	期刊论文
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.