A fractionation model based on three lognormal particle size distributions

作者：Shang Jian-Bo^*; Shi Quan-Lin; Wang Qun-Shu; Zhong Zhen-Yuan; Lei Bei-Fang; Liu Jie; Bai Tao; Dai Yi-Hua; Li Mou

来源：Nuclear Science and Techniques, 2014, 25(5): 050301.

• Fission products
• Fractionation
• Diffusion model

In this paper, a new model is proposed to calculate distribution of fission products in particles of different sizes. The model sensitivity to the effective volume and mass of vaporized soil particles is examined. Compared with other fractionation models, the new method has a much better performance in calculating Y-89,Y-95, but the calculated cumulative activity fraction for particles in diameters over 100 mu m is in between the results using the F-T and G-X models. It is concluded that in a near surface nuclear explosion radioactivity is mainly distributed in soil particles which have not been vaporized, and according to the Henry's law and ideal gas law, Y-89,Y-95 may vary in larger particles when effective volume of the fireball is changed.

• 出版日期2014-10
• 单位清华大学; 西北核技术研究所