Moessbauer study of ilmenite-limonite concrete for nuclear reactor shield

A heavy type concrete for nuclear reactor shield prepared by adding to the portland cement Egyptian iron ores has been studied. This concrete contains heavy elements and a large amount of water of crystallization that make it more effective than ordinary concrete for neutron and gamma attenuation. The measurement of the Moessbauer parameters allows a deeper understanding of the relations between attenuation and physical properties. (Auth.)