Copper-64 is a radioisotope of medical interest that could be used for positron emission tomography imaging and targeted radiotherapy of cancer. In this work, we investigated the possibility of producing the 64Cu isotope through a 65Cu(γ,n) reaction using high-intensity γ-beams produced at the Extreme Light Infrastructure-Nuclear Physics facility (ELI-NP). The specific activity for 64Cu was obtained as a function of target geometry, irradiation time, and electron beam energy, which translates into γ-beam energy. Optimized conditions for the ...