Effect of concrete buildings on the environmental neutron flux by using the reaction ^(197)Au (n,γ) ^(198)Au and extremely low level gamma ray spectroscopy  

作　　者：K. KOMURA N.K. AHMED A.H. EL-KAMEL A.M.M. YOUSEF 

机构地区：[1]Low Level Radioactivity Laboratory, Kanazawa University, Wake Tatsunokuchi, Ishikawa 923-1224, Japan,Physics Department, Faculty of Science, South Valley University, Kena, Egypt,Physics Department, Faculty of Science, Assiut University, Assiut, Egypt,Physics Department, Faculty of Science, South Valley University, Kena, Egypt

出　　处：《Nuclear Science and Techniques》2004年第6期368-374,共7页核技术（英文）

摘　　要：The activation of gold by environmental neutrons through the reaction 197Au (n,γ) 198Au was used to study the effect of concrete buildings on the neutron flux, and to estimate the thermal neutron flux inside and outside these buildings. The results showed that three ceilings of thickness 34 g/cm2 decrease the fast neutrons to 26% from its original value. However, the same reinforced concrete decreases the slow neturon flux to only 62% of its original value. The thermal neutron flux at 283 m from the center of Training Reactor of Kinki University, was twice higher than the environmental neutron background.The activation of gold by environmental neutrons through the reaction 197Au (n,γ) 198Au was used to study the effect of concrete buildings on the neutron flux, and to estimate the thermal neutron flux inside and outside these buildings. The results showed that three ceilings of thickness 34 g/cm2 decrease the fast neutrons to 26% from its original value. However, the same reinforced concrete decreases the slow neturon flux to only 62% of its original value. The thermal neutron flux at 283 m from the center of Training Reactor of Kinki University, was twice higher than the environmental neutron background.

关 键 词：金 活性 混凝土 环境中子 宇宙射线 

分 类 号：TL816[核科学技术—核技术及应用] X125[环境科学与工程—环境科学]