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Carrier-free radionuclides of mercury and gold 192,193Hg and 192,193Au have been produced by heavy ion activation of tantalum target with 95 MeV 1605 § beam obtained from an ECR ion source. An effective radiochemical separation scheme has been developed to isolate gold and mercury radionuclides from the tantalum target matrix.

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No 188 PtϪ 187,188 Ir / Heavy ion irradiation / γ-spectroscopy Summary. Heavy ion irradiation on tantalum metal target with 57 MeV 11 B 4ϩ leads to the production of no-carrier-added radioisotopes of platinum, 187,188 Pt and iridium, 187,188 Ir in the matrix, which have been effectively separated from the bulk target and from each other with suitable anion exchangers employing liquid-liquid extraction (LLX). Also 188,189 Pt and 188,189 Ir radionuclides have been produced, from their shortlived precursors 188,189 Au, in 12 C 6ϩ irradiated tantalum matrix. Gamma-spectroscopy has been utilised to determine the production, extent of separation and purity of the radiotracers at different stages of the experiment.