"ISIS@MACH" Neutron transmission on heavy concrete for barite content optimisation

Heavy concrete for radiation shielding is obtained by making use of heavy natural aggregates such as barites or magnetite in the mixing process. Barite containing systems, whose weight/concentration ratio determines the optimal composition for radiological impermeability and structural performance are mostly used for MeV- energy range diagnostic and therapy ionising radiation installations. We propose a neutron transmission measurement on VESUVIO at ISIS in the neutron energy range 3 meV to about 15 keV where precise neutron attenuation data for the uncollided neutron beam geometry are not available in the literature, by making use of the ISIS@MACH neutron gate.