Spin-resolved photoelectron spectroscopy in the autoionization region of atomic bismuth

The photoionization of atomic bismuth in the complex autoionization region above the first ionization threshold Bi+ (6s(2)6p(2))P-3(0) is studied usin g spin-resolved photoelectron spectroscopy and Hartree-Fock calculations wi th relativistic extensions. In spin- and angle-resolved measurements with c ircularly polarized synchrotron radiation the relative photoelectron intens ity and the polarization parameters A and xi are determined for the stronge st resonances. In calculations taking more than 30 different configurations into account all five dynamical photoionization parameters are determined. The agreement with the experimental data is fairly good. Combining calcula ted and experimental results for the intensity spectrum and the polarizatio n parameter A as well as earlier absorption data, assignments of the first autoionization resonances above the threshold are obtained leading partiall y to a revision of previous results.