Photoionization of Ce3+ and Ce3+@C60

Photoionization of the Ce3+ and Ce3+@C-60 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 C-60 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+@C-60 photoionization process demonstrates both the suppression and the resonance effect of the C-60 shell.