[名词解释] 中子寿命 neutron lifetime
[名词解释] 中子能群 neutron energy group
[名词解释] 中子数密度 neutron (number) density
[名词解释] 中子流密度neutron current density
[名词解释] 扩散(diffusion)
[名词解释] 扩散方程 diffusion equation
[名词解释] 扩散理论 diffusion theory
[名词解释] 扩散长度 diffusion length
[名词解释] 扩散面积 diffusion area
[名词解释] simple diffusion (简单扩散)