We present calculations of two- and three-photon ionization of Xe in the energy region between and slightly above the two ionization thresholds. The resonance structure between the thresholds is treated by multichannel quantum-defect theory and the summation over intermediate states by truncating the sum. Predictions for resonance profiles and photoelectron angular distributions are also presented.

• Received 27 December 1985

DOI:https://doi.org/10.1103/PhysRevA.34.2998