Resonance structure due to the 4d104f7-->4d94f8 transition in the photoionization cross section of atomic europium.

Abstract

Photoionization cross sections for the 4d, 4f, 5s, 5p, and 6s electrons and angular-distribution asymmetry parameters for the 4d, 4f, and 5p electrons of atomic europium at photon energies near the 4${\mathit{d}}^{10}$4${\mathit{f}}^{7}$\ensuremath{\rightarrow}4${\mathit{d}}^{9}$4${\mathit{f}}^{8}$ resonance have been calculated by use of many-body perturbation theory. Interactions among ionization channels were included in the calculation, and the results are compared with experiments and other calculations.