Characterization and MCNP simulation of neutron energy spectrum shift after transmission through strong absorbing materials and its impact on tomography reconstructed image

► Characterization of neutron transmission through strong absorbing material. ► Neutron energy spectrum shift study. ► Beam hardening observation and characterization. ► Beam hardening effect on neutron tomography image appearance. ► MCNP and FBP simulation to adjust attenuation coefficients for a correct tomographic reconstruction.