Comparative studies between the shielding parameters of concretes with different additive aggregates using MCNP-5 simulation code

摘要

In the present work, cementation concretes with different aggregates were produced. The mass attenuation coefficient (mu(m)) for the produced concretes is simulated using MCNP 5 code between 0.047 MeV and 1.836 MeV. Besides, the mu(m) is computed theoretically using XCOM database and the comparison showed an agreement between simulated and computed mu(m) values. The simulated results revealed that the concretes with additive of barite minerals have the highest mu(m) while the lowest mu(m) reported for the concretes with additive hematite minerals. Moreover, we calculated the half value layer (HVL) for all concretes between 0.047 MeV and 1.836 MeV. The results showed that the lowest HVL achieved by concretes with barite minerals while the highest HVL achieved by hematite (this is at low energy). On other hand, at high energy the lowest HVL achieved for concretes with additive chalcocite minerals and the highest HVL achieved for concretes with barite minerals. The effective atomic number and effective electron density are calculated and they found to be maximum at energy 0.047 MeV and then decrease with further increasing in the energy.