Study of relation between the gamma flux buildup factors and source geometry by M-C simulation  

作　　者：Ali Rasouli Hossein Tavakoli-Anbaran 

机构地区：[1]Faculty of Physics, Shahrood University of Technology

出　　处：《Nuclear Science and Techniques》2017年第9期31-35,共5页核技术（英文）

摘　　要：This paper is to achieve a gamma-ray source with the lowest rate of buildup factor, which is of great importance in medical, industrial and agricultural sciences.The flux buildup factor of gamma rays is calculated by the MCNP code for point, linear, surface and volume sources with shield layers of lead, iron and aluminum. The results show that for the high Z shielding material, the flux buildup factor of coaxial cylindrical sources is the lowest(1.6–2.3)of all sources, while for low Z shielding materials, the coaxial disk surface sources have smaller buildup factor(1.45–1.6).This paper is to achieve a gamma-ray source with the lowest rate of buildup factor, which is of great importance in medical, industrial and agricultural sciences. The flux buildup factor of gamma rays is calculated by the MCNP code for point, linear, surface and volume sources with shield layers of lead, iron and aluminum. The results show that for the high Z shielding material, the flux buildup factor of coaxial cylindrical sources is the lowest （1.6-2.3） of all sources, while for low Z shielding materials, the coaxial disk surface sources have smaller buildup factor （1.45-1.6）.

关 键 词：通量 几何 模拟 增强因子 Γ射线源 农业科学 MCNP 伽马射线 

分 类 号：O434.1[机械工程—光学工程]