High-resolution spectroscopic study of the C 0+ and D 1 Rydberg states of KrXe and of the X 1/2 and A1 3/2 states of KrXe+

► Rotationally resolved electronic and photoelectron spectra of KrXe were recorded. ► Numerous perturbations were analyzed. ► A potential model is presented which accounts qualitatively for the observed structures.