Angular-momentum-dependent Fano profiles in excited zinc atoms

The Fano-equivalent profiles of two negative-ion resonant states have been observed in the integrated Stokes parameters of 636.2 nm photons emitted from the 3d(10)4s4d D-1(2) state of zinc. These profiles reflect the effects of electron exchange and the spin-orbit interaction via the angular-momentum-dependent properties of the alignment and orientation Stokes parameters. The resonant states have energies of 10.98 +/- 0.02 eV and 11.33 +/- 0.02 eV and widths of 0.25 +/- 0.03 eV and 0.33 +/- 0.05 eV, respectively, and are bound to an excited atomic state with a 3d(9) core hole. The lower-energy resonance shows a strong spin-orbit interaction whereas the higher-energy resonance shows negligible spin-orbit interaction.