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In this Letter, we investigate the time delay of photoelectrons by fullerenesshell in endohedrals. We present general formulas in the frame of the randomphase approximation with exchange (RPAE) applied to endohedrals A@CN thatconsist of an atom A located inside of a fullerenes shell constructed of Ncarbon atoms C. We calculate the time delay of electrons that leave the inneratom A in course of A@CN photoionization. Our aim is to clarify the role thatis played by CN shell. As concrete examples of A we have considered Ne, Fr, Krand Xe, and as fullerene we consider C60. The presence of the C60 shellmanifests itself in powerful oscillations of the time delay of an electron thatis ionized from a given subshell nl by a photon with energy. Calculations areperformed for outer, subvalent and d-subshells.

Time delay of photoionization by Endohedrals