摘要
金属泡沫材料拥有优良的γ射线屏蔽能力和较低的密度,但影响其屏蔽性能的关键结构参数及作用规律尚不明确,阻碍了该材料屏蔽性能的进一步优化。本文采用蒙特卡罗方法构建了2种最密堆球模型,计算了理想铝基泡沫金属在各结构参数下的屏蔽性能。研究发现,铝基泡沫金属对能量低于0.24 MeV软γ射线屏蔽能力优于铝基块体材料。控制空心球填充率是优化该材料屏蔽性能的主要可操控方式,且在其适合辐射屏蔽能段时材料越轻性能越好。堆球方式是影响材料屏蔽^(137)Cs、^(60)Co源γ射线性能的最重要参数,实现面心立方最密堆球铝基泡沫金属的制备将弱化其在屏蔽硬γ射线时的劣势。
Metal foam is characterized with excellent γ-ray shielding ability and lightweight.However,the relationship between its structural parameters and the radiation shielding performance is not clear,which blocks the further optimization of shielding properties.In this paper,two simulation models of densest packing spheres are constructed,then the shielding performance of ideal Al-based foam metal with various structural parameters is calculated by Monte Carlo.It is found that the Al-based foam metal's shielding capacity against soft γ-ray with energy below 0.24MeV is better than that of A356.Packing density of hollow spheres is the dominant controllable route to optimize the shielding performance of Al-based foam metal:and the lighter the material is,the better the performance is within its suitable radiation shielding energy range.The mode of packing is the most critical factor to affect the shielding capacity against γ-ray from ~(137)Cs and ~(60)Co sources.Preparation of face centered cubic densest packing sphere Al-based foam metal will weaken its inferiority in shielding harder γ-ray.
作者
吴松岭
叶祝涛
李艾华
李刚
刘晓珍
Wu Songling;Ye Zhutao;Li Aihua;Li Gang;Liu Xiaozhen(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Department of Physics,Xiamen University,Xiamen,Fujian,361005,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2023年第S01期125-130,共6页
Nuclear Power Engineering
基金
中国核动力研究设计院反应堆燃料及材料重点实验室基金(STRFML-2020-20)。
