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Slow positron annihilation studies on helium irradiated tungsten

文献类型：会议论文

作者Cao, Xingzhong3; Wang, Zhiguang1; Zhang, Hongpeng1; Sheng, Yanbin1; Chang, Hailong1; Gao, Ning1; Gao, Xing1; Wang, Ji2; Zhu, Huiping4; Sun, Jianrong1
出版日期2017-09
关键词Doppler broadening spectroscopy Helium irradiation Tungsten
卷号406
DOI10.1016/j.nimb.2017.03.127
页码578-584
英文摘要Pure tungsten samples were irradiated to 1.0 x 10(16), 5.0 x 10(16) and 1.0 x 10(17) ions/cm(2) at room temperature with 500 and 200 keV helium ions, respectively, to understand the growth of vacancy like defects in tungsten induced by helium irradiation. The doppler broadening spectroscopy of slow positron annihilation was used to characterize the behavior of vacancy like defects, such as HeliumnVacancym (i.e. HenVm) complexes, induced by He irradiation. When the irradiation fluence is below 1.0 x 10(17) ions/cm(2), the size and density of vacancy like defects show increasing trends with increasing fluences. The density of vacancy like defects decreases with increasing depths due to the increasing amounts or n/m ratios in HenVm complexes. When the ratios reach certain values, the size of vacancy like defects increases. When the 200 keV He irradiation fluence increases to 1.0 x 10(17) ions/cm(2), the size of vacancy like defects decreases. When the 500 keV He irradiation fluence increases to 1.0 x 10(17) ions/cm(2), the size and density of vacancy like defects grow larger. The formation and evolution of irradiation induced defects and the growth mechanism of HenVm complexes are discussed in this paper on the bases of dpa levels, He concentrations, C-He/dpa ratios and electronic energy loss depositions. (C) 2017 Elsevier B.V. All rights reserved.
会议录NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
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
资助项目National Natural Science Foundation of China[11605256] ; National Natural Science Foundation of China[91426301] ; National Natural Science Foundation of China[11405231] ; National Natural Science Foundation of China[11505246] ; National Natural Science Foundation of China[11375242] ; National Natural Science Foundation of China[11575258] ; National Natural Science Foundation of China[11505247]
WOS研究方向Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
WOS记录号WOS:000407659500034
源URL[http://119.78.100.186/handle/113462/58423]  
专题近代物理研究所_先进核能材料研究室（ADS）
通讯作者Wang, Zhiguang; Cui, Minghuan
作者单位1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Ningbo Inst Ind Technol, Ningbo 315200, Zhejiang, Peoples R China
3.Chinese Acad Sci, Key Lab Nucl Anal Tech, Inst High Energy Phys, Beijing 100049, Peoples R China
4.North China Elect Power Univ, Beijing 102206, Peoples R China
推荐引用方式
GB/T 7714		 Cao, Xingzhong,Wang, Zhiguang,Zhang, Hongpeng,et al. Slow positron annihilation studies on helium irradiated tungsten[C]. 见:.

入库方式： OAI收割

来源：近代物理研究所

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