A process for the selective production and isolation of high specific activity cu.sup.67 from proton-irradiated enriched Zn.sup.70 target comprises target fabrication, target irradiation with low energy (<25 MeV) protons, chemical separation of the Cu.sup.67 product from the target material and radioactive impurities of gallium, cobalt, iron, and stable aluminum via electrochemical methods or ion exchange using both anion and cation organic ion exchangers, chemical recovery of the enriched Zn.sup.70 target material, and fabrication of new targets for re-irradiation is disclosed.

Un procedimento per la produzione selettiva e l'isolamento di alta attività specifica cu.sup.67 dall'obiettivo arricchito protone-irradiato Zn.sup.70 contiene il montaggio dell'obiettivo, irradiazione dell'obiettivo con energia bassa (