Abstract
The Ca 2p resonances at 345-355 eV were studied by photoion and photoelectron spectroscopy using monochromatized synchrotron radiation and atomic-beam technique. The analysis of the excitation and decay of these resonances shows strong configuration mixing between the different subshells of the valence electrons 4s, 3d, and 4p. In the case of the 2p - 1 3 / 2 resonance structure at 348 eV there are two excited states with nearly equal contributions from the configuration 2p 5 3d4s 2 and 2p 5 sd 2 4s, which gives rise to strong variations of the resonantly enhanced 3 p 4(3b,4s) 3 photoelectron lines when scanning the photon energy across the resonance.
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