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Resonant electron emission of atomic Eu and Sm around the 4d giant resonance

The electron-emission spectra of atomic Eu and Sm after resonant 4d to 4f excitation by synchrotron radiation have been measured. Energy levels have been calculated using a multiconfiguration Dirac-Fock code. Strong enhancement of the resonant structures has been found at the resonant excitations below the giant resonance. The present vapour-phase results are in good agreement with the corresponding solid-state results, especially for Eu.