Modification of defects induced by nuclear collisions in Fe and Ni in electronic stopping power regime

	Modification of defects induced by nuclear collisions in Fe and Ni in electronic stopping power regime
	Wang, ZG ; Dufour, C ; Jin, YF ; Hou, MD ; Jin, GM ; Paumier, E
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
	1998-12-01
卷号	146 页码:290-295
关键词	electronic energy loss thermal spike vacancy and interstitial defect production and annealing damage efficiency recombination cross section
ISSN号	0168-583X
英文摘要	Electronic energy loss (S-e) induced modification of collisional defects in Fe and Ni was theoretically studied under the framework of thermal spike model. The initial spatial density of defects created by nuclear collisions was calculated by use of binary collision theory with charge screen. Taking into account the characteristics of defect annealing substages, temperature dependent atomistic jumps and migrations, the modification of collisional defects in Fe and Ni caused by S-e was simulated in a cylindrical geometry. For iron, the theoretical damages were deduced from calculations and compared with experiments. It was found that the number z of quasi-free electrons in iron participating S-e induced thermal spike process is about 1.5 per atom and, by use of z=1.5, the deduced defect recombination cross section values in iron are in agreement with experiments. Furthermore, three regions characterized by the concentrations of interstitials and vacancies are proposed. Similar variation tendency of damage efficiency in nickel was observed from numerical calculations. Thus, the S-e induced defect modification in pure metals may be due to a transient thermal process. (C) 1998 Elsevier Science B.V. All rights reserved.
WOS关键词	HEAVY-ION IRRADIATION ; TRANSIENT THERMAL-PROCESS ; DAMAGE CREATION ; METALLIC TARGETS ; PURE METALS ; EXCITATIONS ; IRON ; NICKEL
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:000077719400045
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/35370]
专题	中国科学院近代物理研究所
通讯作者	Wang, ZG
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Inst Sci Mat & Rayonnement, LERMAT, F-14050 Caen, France 3.CIRIL, F-14070 Caen, France
推荐引用方式 GB/T 7714	Wang, ZG,Dufour, C,Jin, YF,et al. Modification of defects induced by nuclear collisions in Fe and Ni in electronic stopping power regime[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,1998,146:290-295.
APA	Wang, ZG,Dufour, C,Jin, YF,Hou, MD,Jin, GM,&Paumier, E.(1998).Modification of defects induced by nuclear collisions in Fe and Ni in electronic stopping power regime.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,146,290-295.
MLA	Wang, ZG,et al."Modification of defects induced by nuclear collisions in Fe and Ni in electronic stopping power regime".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 146(1998):290-295.