[Production of 67Ga, 68Ga by bombardment of natural zinc target with alpha and 3He particles (author's transl)].

In order to determine the optimum irradiation condition for the production of 67Ga and 68Ga, used in nuclear medicine, excitation function and thick-target yield curves were obtained for alpha and helium-3 reactions of natural zinc. With the initial alpha energy of 25 MeV, the thick-target yield of 67Ga was found to be 165 muCi/muA.hr at the end of bombardment and the 66Ga contamination could be reduced to less than 1% after about 3 days of cooling. 68Ga could be obtained by milking from 68Ge. With the alpha energy range of 17-40 MeV, the thick-target yield of 68Ga was 1.2 muCi/muA.hr at the end of bombardment.