钨玻璃与铅玻璃对X射线辐射屏蔽效果的数值计算分析

Comparative x-ray radiation shielding effect between tungsten glass and lead glass by numerical calculation analysis

通过WINXCOM理论计算X射线能量在20~100 keV下,钨和铅硅酸盐玻璃的质量衰减系数、有效原子序数和半值层。结果发现,随着WO_3和PbO含量的增加质量衰减系数增加。钨玻璃在70 keV能量下,由于光电效应发生突变,质量衰减系数突然增强。随后,利用MCNP 5计算5种能量下钨玻璃的积累因子,以便进一步修正模拟结果以达到真实情况。

The mass attenuation coefficients,effective atomic number and half-value layer of tungsten and lead silicate glasses have been theoretically calculated for X-rays photon energies of 20 keV^100 keV by WINXCOM program.These results indicate that the total mass attenuation coefficients were increased by increasing WO_3 and PbO concentration.Mass attenuation coefficient of tungsten glass suddenly increases at energy of 70 keV,due to the photoelectric had mutation.Subsequently,the build-up factor of tungsten glass has been calculationed by MCNP 5 at five kinds of energies,so that further amendments to the simulation results in order to achieve real situation.