L² K-matrix method for triply excited lithium

The saddle-point method is combined with the L² K-matrix method to investigate total as well as partial photoionization cross sections and electron-ion elastic and inelastic scattering cross sections. This approach allows us to use highly precise initial state and final target state wave functions. The results obtained are sufficiently accurate for experimental energy and cross-section calibrations. As an illustration, we present the results near the Li 2s2s2p ²P^o triply excited resonance. These results are used to recalibrate the recent high-resolution experimental spectra.