特殊中子束流装置特性研究

Characteristic Research on Special Neutron Beam Equipment

利用金箔活化法测量了特殊束流装置中心轴线上不同位置处的热中子通量密度比、金镉比、锰镉比以及出口处γ/n的剂量比。束流装置出口处的热中子通量密度约为入口处的1/1019,出口处γ/n的剂量当量比约为21%。将束流装置出口与入口处热中子通量密度的实验结果与用MCNP/4B程序计算结果进行了比较,两者相差约为5%。

The neutron flux density ratio, Au-Cd ratio, Mn-Cd ratio at various positions in special neutron beam equipment are measured by gold foil method. The ratio of neutron flux density at equipment entrance to that at equipment exit is 1 019, and the dose equivalent rate ratio of γ-ray to neutron is 21% at the exit of equipment.