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Activation techniques have been used to measure the excitation functions of proton induced nuclear reactions on natural copper from their thresholds up to 27.5 MeV. The beam current was measured using a Faraday cup with secondary electron suppression, and the radioactivity of the products was determined  via  high-resolution gamma ray spectrometry. The data were compared with the data recommended by the IAEA wherever it was possible. A comparison of the new excitation functions with the theoretical calculations reported in the literature was undertaken to check the order of agreement between them. Good agreement was found for the results of  63 Zn while the theoretical calculations overestimate the cross sections for  61 Cu and  62 Zn. The excitation function for the reaction  nat Cu( p ,  x )  61 Co was measured for the first time during this work. The integral yields of the radionuclides  62,63,65 Zn,  61 Cu and  61 Co were calculated.  63 Zn and  65 Zn are produced over the whole energy range of 3 to 27.5 MeV and the yield gets saturated above 20 MeV.  62 Zn,  61 Cu and  61 Co are produced at relatively high energies and have integral yield values between those of  63 Zn and  65 Zn. The relatively high yield of  62 Zn is useful for the production of  62 Zn/ 62 Cu generator system.

Excitation functions of proton induced nuclear reactions on natural copper using a medium-sized cyclotron