Photoelectron angular distributions from zinc, cadmium and mercury

It is well known that atomic autoionizing energy levels cause resonant behavior in the energy dependence of the asymmetry parameter β that describes photoelectron angular distributions. We have calculated the spectral variation of β across the autoionizing (n - 1)d⁹ ns² np configurations of Zn, Cd and Hg (n = 4, 5, 6). We use empirical single-configuration Slater-Condon parameters, obtained from spectroscopic data, in a theory of overlapping and interacting resonances. The calculations show good agreement with available experimental measurements.