\begin{document}$10.1 \le E_\gamma \le 17.6$\end{document} MeV, the measured \begin{document}$\sigma(E_\gamma)$\end{document} data have an uncertainty of \begin{document}$\lesssim 4$\end{document}%, and a pronounced giant-dipole peak is observed at \begin{document}$E_\gamma \simeq 16.65$\end{document} MeV with a maximal cross section of \begin{document}$\sigma_{\text{max}} \simeq 137$\end{document} mb. These photoneutron data are compared with previous experimental results and are employed to extract the γ-ray strength function of 65Cu above the neutron threshold. Furthermore, we calculate the radiative neutron capture cross sections and astrophysical reaction rates for 64Cu, which is a short-lived intermediate nucleus whose reaction rate controls the local abundance distribution in the weak s-process. It is found that the calculated 64Cu(n, γ)65Cu data have an overall agreement with ENDF/B-VIII.0, JEFF-3.3, and TENDL-2023 evaluations, and the corresponding astrophysical reaction rates are consistent with those reported in the JINA REACLIB database."> Photoneutron cross section measurements on <sup>65</sup>Cu: toward understanding (<i>n,</i> <i>γ</i>) cross sections relevant to weak <i>s</i>-process nucleosynthesis -
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