Vibrational effects in the photoionization shape resonance leading to thestate of C
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The effect of vibrational averaging on the photoionization cross section and photoelectron asymmetry parameter for photoionization of CO2 leading to the C g+2 state of CO2+ has been studied. We have computed the photoionization continuum wave function in the frozen-core Hartree-Fock approximation using the iterative Schwinger variational method. Averaging over the symmetric stretching mode of CO2 reduced the peak resonant cross section by about 15%. This is in contrast to the earlier published results using the continuum multiple-scattering method where a much larger reduction in the peak cross section was obtained. A similar difference between these two theoretical methods was seen in their predicted asymmetry parameters. The present results have also been compared to available experimental data. 1982 The American Physical Society.
author list (cited authors)
Lucchese, R. R., & McKoy, V.
complete list of authors
Lucchese, Robert R||McKoy, Vincent