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\textbf{Abstract}   The time-dependent density functional theory coupled with molecular dynamics is used to study electronic excitations produced by energetic protons ($\mathrm{H^+}$) in Cu over a wide range of proton velocities. A plane-wave pseudopotential scheme is employed to solve the time-dependent Kohn-Sham equations for $\mathrm{H^+}$ and $\mathrm{Cu}$ crystal. These electronic excitations phenomena are used to study interatomic forces and electronic stopping powers due to both channeling and off-channeling trajectories [IS THERE OFFCHANELLING?]. Our results are in good agreement with SRIM \textsc{Srim}  (Stopping and Range of Ions in Matter) predictions. Also these results unveil new effects of lower velocity dependence on copper crystalline band structure. %You can get started by \textbf{double clicking} this text block and begin editing. You can also click the \textbf{Insert} button below to add new block elements. Or you can \textbf{drag and drop an image} right onto this text. Happy writing!