Thermal scatter treatment of iron in transport of photons and neutrons

The present paper deals with measured as well as calculated energy spectra of neutron and photon beams from the AKR-2 experimental reactor after having passed through Fe layers and Fe/H2O combined layers. The experiment results are compared with calculations presented in various nuclear data libraries, such as, ENDF/B VI.2., ENDF/B VII., BROND 3, JENDL 3.3 and JEFF 3.1. Two models were used to calculate the neutron transport. The first takes into account the atomic structure of the material, whereas the other neglects the effect of inter-atomic bonds assuming the atomic nucleus behaviour to follow the free gas model.