Abstract
The neutron and photon shielding properties of four types of concrete are studied by simulation with MCNP5 code. The photon dose transmission factors with photon energy between 0.1MeV to 20MeV, and the neutron dose transmission factors with neutron energy between thermal neutron to 15MeV are plotted. The result shows that all the properties strongly depend on the particle type, energy, as well as the material density and atomic composition. The secondary photon dose equivalent together with the ratio between secondary photon dose equivalent and neutron dose equivalent is worked out and their variations with the incident neutron energy of various concretes are also plotted. It shows that the secondary photon dose equivalent must be considered especially when the incident neutron energy is low. The results of this paper can provide some reference for future use of concretes and other shielding materials.
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