Abstract

• The high-density composite materials have similar behavior of heavy metals when increasing the proportion of material supported in composite material. In other word measure and determination for the amount of shielding required to provide personal protection on an environment with lowest costs and appropriate selecting materials to reduce radiation doses in industrial facilities and surrounding areas. In this research, the numerical buildup factor and the linear attenuation coefficient were accounted as a function for the concentration of cement in shields with 25%, 50% and 75% of iron powder. The shield thickness of shielding composite materials that supported by these concentrations of iron in cement powders in the range of (5-40) mm was done. From the results, it is found that the better attenuation coefficient become in its each composite sample, the more iron concentration increased in cement. In this research, it is cleared that the most iron concentration in cement is the best shielding ability.