High-resolution photoelectron spectrometry study of conjugate shakeup processes in the Li 1sthreshold region

Partial cross sections and angular-distribution asymmetry parameters of diagram and satellite lines associated with Li 1s photoionization were measured using synchrotron-radiation excitation. Special emphasis was given to a high-resolution study of the ${}_{}{}^1{}_{}{}^{}$P and ${}_{}{}^3{}_{}{}^{}$P conjugate shakeup satellite lines testing qualitative predictions of the conjugate shakeup model: increasing σ and decreasing β values towards threshold, both being verified. Comparison with recent relaxed Hartree-Fock calculations shows good agreement for the ${}_{}{}^1{}_{}{}^{}$P satellite, but demonstrates also that the present theory does not seem to be able to describe the cross-section behavior of the ${}_{}{}^3{}_{}{}^{}$P satellite correctly.