Spin polarization of photoelectrons from zinc atoms in the 3d⁹4s²4p autoionization region

We have measured the energy dependence of the dynamical spin-polarization parameters for photoelectrons from zinc atoms in the wavelength region from 100 nm to 115 nm. The pronounced structure near the Zn(3d⁹4s²4p) ¹P₁,³D₁,³P₁ resonances found in previously measured absorption spectra also occurs in the spin-polarization parameters. From the experimental results the dipole transition matrix elements induding the relative phase shift difference have been determined. The data are also compared with an existing R-matrix calculation and a new calculation employing semi-empirical Slater-Condon parameters.