Abstract

A method of fabricating ceramic cores from ytterbium-168 enriched ytterbium oxide is presented. This method is based on sintering ytterbium oxide powder under high isostatic pressure of about 8 GPa in order to obtain its B-modification with a monoclinic crystal lattice. The equipment used, sintering regimes, and an analysis of the obtained samples are described. Owing to their high density (to 10.2 g/cm3) the samples hold promise as sources for contact radiation therapy of tumors.

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