Co elements in Shanghai Irradiation Base and the benefits thus brought in are described. The determination of build-up factor Bγ is also presented. Two methods using under-water and over-water ionization chambers respectively are compared and the former is found to be more accurate.
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马瑞德 等 , 辐射加工技术 , 四川科学技术出版社 , 1984 年, 第88页 。
A. E. Profio , Radiation shielding and dosimetry , New York , Wiley-Interscience , 1979 , p. 225 .