Photoionization of the Ba 6snl1Lstates

The photoionization cross sections of the singly excited Ba states 6 snl ${}_{}{}^1{}_{}{}^{}$L with n=5-9 and l=0-2 have been calculated in the Hartree-Slater approximation over a broad energy range. Our results establish some systematic trends of these cross sections as functions of photon energy and the quantum numbers n and l. Our data for 6s5d extend previous preliminary predictions to higher photon energies and agree very well with recent measurements, in the energy range where channel coupling and autoionizing transitions are not important. Comparison is also made with a calculation carried out within the local-density random-phase approximation.