Revivification of confinement resonances in the photoionization of $A$@C${}_{60}$ endohedral atoms far above thresholds

It is discovered theoretically that significant confinement resonances in an $nl$ photoionization of a $\mathit{\text{multielectron}}$ atom $A$ encaged in carbon fullerenes, A@C${}_{60}$, may re-appear and be strong at photon energies far exceeding the $nl$ ionization threshold, as a general phenomenon. The reasons for this phenomenon are unraveled. The Ne $2p$ photoionization of the endohedral anion Ne@C${}_{60}^{5-}$ in the photon energy region of about a thousand eV above the $2p$ threshold is chosen as case study.