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弹性反冲探测分析技术在材料氦行为研究中的应用
引用本文:高杰,王春杰,韩志斌,李燕,施立群,雷前涛,邓琪,黄鹤飞.弹性反冲探测分析技术在材料氦行为研究中的应用[J].原子核物理评论,2017,34(3):656-660.
作者姓名:高杰  王春杰  韩志斌  李燕  施立群  雷前涛  邓琪  黄鹤飞
作者单位:1.中国科学院上海应用物理研究所, 上海 201800;
基金项目:国家自然科学基金资助项目(91126012);上海市自然科学基金资助项目(14ZR1448300)
摘    要:弹性反冲探测分析技术(ERDA)对轻元素的测定具有灵敏度高、包含深度信息的优势,因此在材料氦行为研究中发挥着重要作用。镍基哈氏N合金被认为是未来熔盐堆的结构材料,氦脆是其服役性能下降的主要因素之一。利用掠入射模式的ERDA,解析了哈氏N合金样品中的氦原子浓度及其分布,但仅局限于0~175 nm深度范围内。结果表明:在800℃的退火条件下,距离样品辐照表面~33 nm深度区域内,出现了氦原子逃逸现象。更高温度的退火(1 050℃)可加剧氦原子的逃逸,但样品中仍有氦原子滞留。另外,采用透射式的ERDA,极大地扩大了对氦原子分析的深度范围,得到了纯镍薄膜在0~950 nm深度区域内的氦原子浓度分布。这表明将块体材料制备成薄膜样品,利用透射模式的ERDA,将可以得到氦原子在更大范围内的扩散、逃逸行为。Since the elastic recoil detection analysis (ERDA) technique has the advantages of high sensitivity and deep information in analyzing the light elements, it plays an important role in the study of helium behavior in materials. Helium embrittlement is one of the main reasons for the degradation of the Hastelloy N alloy, which has been considered as the promising candidate structural material for the further molten salt reactor. In this work, the profile of helium concentrationin sample of Hastelloy N alloy was analyzed by ERDA experiments applying grazing-incidence geometry. However, the result was limited within the depth range of 0~175 nm, and it shown that helium atoms escaped in the range from the irradiated surface of the sample to the depth of ~33 nm when annealing the sample at 800℃ The annealing at higher temperature (1 050℃) increased the escape of helium atoms, but a small fraction of helium atoms still trapped in the sample. In addition, the profile of helium concentration was obtained in the helium-irradiated pure nickel film in the depth range of 0~950 nm, using the ERDA experiments in transmission geometry. This indicates that the diffusion behavior of helium atoms in bulk samples can be completely obtained using the ERDA experiments in tranmission geometry if the bulk material can be prepared into a thin film sample.

关 键 词:弹性反冲探测分析    氦行为    掠入射    透射式
收稿时间:2016-12-06

Application of Elastic Recoil Detection Analysis Technique in the Study of Helium Behavior in Materials
GAO Jie,WANG Chunjie,HAN Zhibin,LI Yan,SHI Liqun,LEI Qiantao,DENG Qi,HUANG Hefei.Application of Elastic Recoil Detection Analysis Technique in the Study of Helium Behavior in Materials[J].Nuclear Physics Review,2017,34(3):656-660.
Authors:GAO Jie  WANG Chunjie  HAN Zhibin  LI Yan  SHI Liqun  LEI Qiantao  DENG Qi  HUANG Hefei
Affiliation:1.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;3.Institute of Modern Physics, Fudan University, Shanghai 200433, China
Abstract:Since the elastic recoil detection analysis (ERDA) technique has the advantages of high sensitivity and deep information in analyzing the light elements, it plays an important role in the study of helium behavior in materials. Helium embrittlement is one of the main reasons for the degradation of the Hastelloy N alloy, which has been considered as the promising candidate structural material for the further molten salt reactor. In this work, the profile of helium concentrationin sample of Hastelloy N alloy was analyzed by ERDA experiments applying grazing-incidence geometry. However, the result was limited within the depth range of 0~175 nm, and it shown that helium atoms escaped in the range from the irradiated surface of the sample to the depth of ~33 nm when annealing the sample at 800℃ The annealing at higher temperature (1 050℃) increased the escape of helium atoms, but a small fraction of helium atoms still trapped in the sample. In addition, the profile of helium concentration was obtained in the helium-irradiated pure nickel film in the depth range of 0~950 nm, using the ERDA experiments in transmission geometry. This indicates that the diffusion behavior of helium atoms in bulk samples can be completely obtained using the ERDA experiments in tranmission geometry if the bulk material can be prepared into a thin film sample.
Keywords:ERDA  helium behavior  glancing incidence geometry  transmission geometry
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