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Excitation functions were measured by the stacked-foil technique for the ,47 Sm( 3 He,xn)-processes over the energy range of 12 to 37 MeV, and the 144 Sm(a,xn)-reactions over the energy range of 12 to 27 MeV. Thin samples of 96.5% enriched ,47 Sm 2 0 3 or 86.6% enriched ,44 Sm 2 0, of 10 mm diameter and 2-5 mg/cm 2 thickness were prepared via a sedimentation method. Thick target yields of l47 Gd were calculated from the measured excitation functions and the levels of radiogadolinium impurities were determined experimentally. The optimum energy range for the production of ,47 Gd via the 144 Sm( 3 He,3n)-process was found to be E 3a¡ = 36->13 MeV and via the 14? Sm(«,n)reaction as E a = 27->13 MeV. The expected thick target yield of ,47 Gd over the optimum energy range is 9.5 MBq/μΑΙι for the 'He-induced reaction and 4.6 MBq/μΑΙι for the α-induced reaction.