Atomic physics of channeled ions

Abstract

Electronic states of swift channeled ions are studied in terms of a time-dependent effective-Hamiltonian theory. These states are shifted in energy by the electric potential of the perturbed crystal, and transitions among them are induced coherently by the oscillation of the potential. Calculated energies for low-lying states of hydrogenic ions channeled in Au are in reasonable agreement with experimental resonant coherent-excitation spectra.