Photoelectron and photoion spectroscopy on atomic Lu in the region of the 5p excitation

The 5p --> nd resonances of atomic Lu have been investigated by photoelectr on and photoion spectroscopy using monochromatized synchrotron radiation in the vacuum ultraviolet energy region. The total photoion yield has been co mpared to calculations in which the extended Fano theory (Mies formalism) a nd the Hartree-Fock method were applied. The resonance structure is dominat ed by the spin-orbit splitting of the 5p, core hole. In the photoion yield spectra of singly and doubly charged ions a high fraction of Lu2+ ions has been found in the region of the 5p(-1)(P-2(1/2))nd resonances. Photoelectro n spectra, recorded in this resonance region; have been investigated with r espect to deexcitation channels connected with Lu2+ ions. The 5p(-1)(P-2(1/ 2))nd resonances predominantly autoionize by spin-Aip into 5p(-1)(P-2(3/2)) epsilon l states, which decay in the second step into Lu2+ final ionic stat es.