ACTIVATION-ANALYSIS OF BAUXITIC MATERIALS BY EPITHERMAL IRRADIATION

For the determination of Ga, Th and U and the group of rare earth elem ents in bauxitic materials an instrumental neutron activation method b ased on the irradiation with epithermal neutrons has been developed. B auxites as well as bauxite tailings from Central Greece were investiga ted using the reference bauxite BX-N of the ANRT (Association National e de la Recherche Technique) for the evaluation. Interference studies were carried out by investigating the isotopic response factors of the various isotopes. The method allowed the rapid and highly sensitive d etermination of the elements Ga, U and Th and of the rare earth elemen ts La, Eu and Gd.