Gamma Ray Shielding by a New Combination of Aluminum, Iron, Copper and Lead Using MCNP5

Different materials are used for the radiation shielding in different are as and for different situations. In this study, a shielding material contains aluminum, iron, copper and lead was simulated as shielding for gamma radiation. This work is concerned with four alloys with different concentrations of the four given materials to get shielding material with high efficiency, and at the same time light to be easily portable and stored. The samples were irradiated by simulated photons emitted from ¹³⁷Cs radioactive point source with 662 ke V. The photon linear attenuation coefficients were calculated using MCNP5 computer code for the simulated shielding materials. Calculated values of attenuation coefficients and Half Value Layer of the all studied samples were compared with each other and with lead as a standard material used in shielding. Consequently, a new shielding material could be preferred as shielding materials against gamma radiation especially sample 4. A cylinder of about 5 cm thickness which is suitable to shield gamma rays emitted by Cs-137 source. The mass of a simulated container from sample 4 is not exceeding 22.5 kg comparing with 32.53 kg of pure lead. It is easy to be handled and stored in laboratories