含碳化硼的吸收和屏蔽中子辐射涂料的研究

对碳化硼(B4C)/环氧树脂涂料合成工艺进行研究,制得一种以793树脂作为固化剂的能屏蔽和吸收中子辐射的涂料.对B4C/环氧树脂涂料的成膜条件及不同含量B4C涂料的硬度、抗冲击性、附着力和柔韧性等物理机械性能进行测试研究.结果表明,含有30%B4C的环氧树脂涂料的总体机械性能最佳.在此基础上,考察了不同涂膜厚度下B4C/环氧树脂涂料的防中子辐射的性能,薄膜厚度超过300,μm时,可以有效屏蔽中子射线.

Monte Carlo Evaluation for SSRF Beam Holes Shielding Neutrons of Front End Ratchet Walls

This study investigated the characteristics of bremsstrahlung and induced neutrons from the elec- tron storage ring in the Shanghai Synchrotron Radiation Facility (SSRF).The EGSnrc and MCNP Monte Carlo code has been used to perform the assess neutron and photon dose profiles for a variety of shield ma- terials ranging from 5 to 115cm thick.The Monte Carlo simulations show that single material such as lead, iron and polyethylene have been found to be ineffective biological shield materials,while the mixed materials serve as effective shields for shielding high energy neutron.Mixed materials such as lead or iron combined with polyethylene or with concrete are good materials combination for high energy neutron radiation shield.And high-Z materials such as lead or iron combine with low-Z material containing some hydrogen such polyethylene are effective for shielding high energy neutrons as well as bremsstrahlung.