宽能中子辐射个人防护材料研究

目的 研究可用于制作宽能中子辐射个人防护用品的柔性屏蔽材料。方法 依据理论计算结果配比加工实验用材料样品,利用²⁵²Cf裂变中子和加速器单能中子开展中子屏蔽效率实验。结果 给出了1.5 cm厚含10％碳化硼(B₄C)的乙丙橡胶板对144 keV等6个单能中子和²⁵²Cf裂变中子的屏蔽效率,其中对²⁵²Cf裂变中子的屏蔽效率为31.02%,对144 keV中子的屏蔽效率可达到76.9％。结论 以乙丙橡胶为基材掺入B₄C研制的个人中子防护柔性材料对不同能量中子辐射均有一定屏蔽效果,可用于制作宽能中子个人防护用品。

Research on personal protection materials against wide energy neutron radiation

Objective To study the flexible shielding materials used for making personal protective equipment against wide energy neutron radiation. Method The experimental samples were processed according to the theoretical calculation results, and the neutron shielding efficiency experiment was carried out by using ²⁵²Cf fission neutrons and accelerator monoenergy neutrons. Results The shielding efficiency of a 1.5 cm thick ethylene-propylene rubber plate containing 10% boron carbide against six mononuclear neutrons such as 144 keV and ²⁵²Cf fission neutrons was obtained, being 31.02% for ²⁵²Cf fission neutrons and 76.9% for 144 keV neutrons. Conclusions The personal neutron protection material, made of ethylene-propylene rubber and boron carbide, has a certain shielding efficiency against neutron radiation of different energies, and can be used to make personal protective equipment against wide energy neutron.