Modification of defects induced by nuclear collisions in Fe and Ni in electronic stopping power regime
文献类型：会议论文
| 作者 | Wang, ZG; Dufour, C; Jin, YF; Hou, MD; Jin, GM; Paumier, E |
| 出版日期 | 1998-12 |
| 关键词 | electronic energy loss thermal spike vacancy and interstitial defect production and annealing damage efficiency recombination cross section |
| 卷号 | 146 |
| 期号 | 1-4 |
| 页码 | 290-295 |
| 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. |
| 会议录 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
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| 会议录出版者 | ELSEVIER SCIENCE BV |
| 会议录出版地 | PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| 语种 | 英语 |
| WOS研究方向 | Instruments & Instrumentation ; Nuclear Science & Technology ; Physics |
| WOS记录号 | WOS:000077719400045 |
| 源URL | [http://119.78.100.186/handle/113462/57687]  |
| 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[C]. 见:. |
入库方式： OAI收割
来源：近代物理研究所
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