Photoionization of excited3dstates in Na and K: Investigation of thel→l−1zeros

The photoionization of the excited Na and K $3d$ states have been calculated with use of various numerical and analytic Hartree-Fock wave functions. Particular attention was paid to the zeros in the $3d\to \epsilon p$ dipole matrix elements and their sensitivity to slight changes in the initial-state wave functions. It was found that only the numerical wave functions were reliable. In addition, it was found that these zeros had virtually no effect on the total subshell cross sections; however, they had a strong influence on the photoelectron angular distributions.