Lambert Academic Publishing, Hamburg, 2021
Since the structures of graphene- or carbon-based materials are being the most important ones of daily life from day to day they are very attractive for researchers. The richness of various optical and electronic behaviors has made them one of the rapidly rising materials on the horizon of material science and condensed matter physics. Having the sheets of atoms that are stacked in a disorganized manner makes activated carbon being different from other forms of carbon –graphite- structures. The researches about the shielding properties of graphene and activated carbon atoms for gamma-rays are very rare and required to be improved. Since the use of radioactive sources in different fields (nuclear industry, shielding material, radiation biophysics and space research application, etc.) has been increasing expeditiously, the photon interactions with matter has gained more importance in the world of material science technology. In this work, we reviewed the basics of the impregnated activated carbons (AC1 and AC2) and graphene, as well as the link between the structural behaviors and the gamma shielding properties in terms of both quality and efficiency. Both XCom software and EGSnrc simulation code were used to obtain the theoretical calculations that are significantly important to be able to understand the shielding properties of impregnated activated carbons (AC1 and AC2) and graphene for gamma-rays. At the end, the mass attenuation coefficients (µm), the total atomic and the electronic cross-sections (σt,a and σt,e), the effective atomic number and the effective electron density (Zeff and Neff), the half value layer (HVL), the tenth value layer (TVL), and the mean free path (MFP) values of such materials were calculated and then compared with those of some other known shielding materials like lead, borosilicate, concrete and vermiculite. The calculated data showed that impregnated activated carbons (AC1 and AC2) are very appropriate and consistent to be one of the candidates for shielding materials of gamma-rays even though the graphene is seen as inconsistent for this purpose.