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WC-12Co涂层对中子、γ射线的屏蔽特性及其结合强度的辐照效应 被引量:1
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作者 马晓军 邱长军 《热加工工艺》 CSCD 北大核心 2008年第9期78-80,共3页
采用常规氧-乙炔焰喷涂技术制备WC-12Co涂层,模拟计算了涂层对中子、γ射线的屏蔽特性。将试样分别置于5#固体镭γ源、Am-Be中子源接受100天辐照,测试辐照前后涂层的结合强度,EDS能谱分析了辐照前后涂层界面元素分布规律。结果表明,γ... 采用常规氧-乙炔焰喷涂技术制备WC-12Co涂层,模拟计算了涂层对中子、γ射线的屏蔽特性。将试样分别置于5#固体镭γ源、Am-Be中子源接受100天辐照,测试辐照前后涂层的结合强度,EDS能谱分析了辐照前后涂层界面元素分布规律。结果表明,γ光子能量小于0.01MeV时,0.5~1mm厚的WC-12Co涂层可以屏蔽98%以上的射线。1mm厚的WC-12Co涂层可以屏蔽12%的热中子,快中子屏蔽效果欠佳。涂层经中子辐照后强度提高20%~50%,γ射线对涂层强度没有明显影响。中子辐照前后涂层界面元素无扩散现象。初步分析认为,中子辐照后涂层强度提高可能与材料屈服强度、抗拉强度的提高有关。 展开更多
关键词 WC-12CO涂层 中子、γ射线 屏蔽特性 结合强度
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Simultaneous Measurements of Rainfall Intensity, Low Energy Neutrons and Gamma Radiation in Sao Jose Dos Campos, SP, Brazil 被引量:1
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作者 Marcelo Pego Gomes Inacio Malmonge Martin +4 位作者 Mauro Angelo Alves Bogos Nubar Sismanoglu Marco Antonio S. Ferro Marcos Pinto Flavio Antonio 《Journal of Environmental Science and Engineering(B)》 2013年第11期643-647,共5页
The article aims to study the possible correlation between the presence and intensity of rainfall X- and T-radiation and low energy neutrons at one specific location in S[io Jos6 dos Campos, SP, Brazil. Monitoring of ... The article aims to study the possible correlation between the presence and intensity of rainfall X- and T-radiation and low energy neutrons at one specific location in S[io Jos6 dos Campos, SP, Brazil. Monitoring of these parameters was carried out from end February to half of June 2013 just in Physics Department of ITA (Technological Institute of Aeronautics). By correlating the data of measurements of intensity of X and ),-radiations with the rainfall it has been found that this meteorological parameter had a significant influence on the background of these radiation profile. A possible reason for this fact is associated with the presence of radon gas in the environment that is dragged to the surface during the occurrences of local rainfall. In relation neutrons, it was possible to note that the rainfall has small influence on this parameter measures. 展开更多
关键词 X- and y-radiation low energy neutron rainfalls experimental measurements.
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