High resolution spectroscopy of 2p6→2p53d2p^6\to2p^53d resonantly excited atomic Ca

Free calcium atoms were excited in the energy region about 10 eV below the 2p thresholds. For the excitation, synchrotron radiation from the high resolution undulator beamline BW3 (HASYLAB, Hamburg) equipped with a SX-700 monochromator was used. The excited atoms were studied by means of ion as well as electron spectroscopy. Two lines could be resolved within one of the two dominating features of the 2p→3d resonance. Resonance enhanced 3p−1 photoelectron spectra resolving the 2P12 and 2P32 lines are presented