Experimental Verification of Many-Electron Effects in the 4d, 5s, and 5p Partial Photoionization Cross Sections of Cs

Abstract

The partial 4d10, 5s2, and 5p6 photoionization cross-sections of metallic Cs have been measured in the energy range 50–210 eV at the Stanford Synchrotron Radiation Laboratory. The shapes of the absorption resonances are in good agreement with RPAE theory, particularly when relaxation is considered. There is, however, some discrepancy between theory and experiment concerning the relative contribution of each component. In addition, comparison with the total absorption cross-section indicates a considerable contribution to absorption near the 4d threshold which is presumably due to two-electron excitation.