Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2004, Vol. 15 ›› Issue (6): 368

• ADVANCED NUCLEAR INSTRUMENTATION AND DETECTION • Previous Articles     Next Articles

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

K. KOMURA1, N.K. AHMED2, A.H. EL-KAMEL3, A.M.M. YOUSEF2   

  1. 1 Low Level Radioactivity Laboratory, Kanazawa University, Wake Tatsunokuchi, Ishikawa 923-1224, Japan;
    2 Physics Department, Faculty of Science, South Valley University, Kena, Egypt;
    3 Physics Department, Faculty of Science, Assiut University, Assiut, Egypt
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K. KOMURA, N.K. AHMED, A.H. EL-KAMEL, A.M.M. YOUSEF. Effect of concrete buildings on the environmental neutron flux by using the reaction 197Au (n,γ) 198Au and extremely low level gamma ray spectroscopy.Nuclear Science and Techniques, 2004, 15(6): 368

Abstract: 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.

Key words: Environmental neutrons, Gold, Activation, Concrete