Photoionization of Ce3+and Ce3+@C60

Photoionization of the Ce3+ and Ce3+@C60 in the energy region 100–150 eV has been studied using our recently developed random phase approximation with exchange method and model potential for the C60 fullerene. Comparison of the results of the Ce3+ photoionization with a recent measurement (Muller et al 2008 Phys. Rev. Lett. 101 133001) confirms the value of the measured cross section for Ce3+ and indirectly supports the observed suppression effect of the carbon cage in the endohedral fullerene Ce@C+82 photoionization. Our calculation of the Ce3+@C60 photoionization process demonstrates both the suppression and the resonance effect of the C60 shell.