Figure 1: Cross section view of the electron spectrometer chamber. The chamber is 76 cm in diameter and is 91.4 cm in length. The major aspects of the instrument are labeled in the figure.
Figure 2: Photoionization efficiency spectrum for CO2 in the wavelength region from ionization onset to 600 Å. The data were taken using a photoionization mass spectrometer system with a wavelength resolution of 0.12 Å.
Figure 3: Two photoelectron spectra taken on the 0° analyzer at nearby wavelengths. The spectrum differ considerably but the same model fits both relatively well. The solid line is the fit and the dots are the actual data. The vertical columns represent the intensities of the various vibrational transitions as defined in the figure that contribute to the intensity at that point.
Figure 4: Total electron count measured with the electron spectrometer system plotted as a function of wavelength in Å. The main autoionizing Rydberg levels are identified as described in the text.
Figure 5: Three dimensional plot of the results of the fitting routine for all the spectra measured. The molecular energy axis represents the vibrational excitation of the ionic ground state of CO2+. The plot dramatically shows the increased vibrational excitation caused by autoionization phenomena.
Figure 20: Plots of the asymmetry parameter and branching ratio for the (712) level of the CO2+ ground state.
Figure 21: Histogram of the measured Franck-Condon factors for the CO2+ ground state at positions in the absorption spectrum where Rydberg autoionizing resonance levels exist. The resonances are labeled as in the text.
Figure 22: Histogram of the calculated Franck-Condon factors for the CO2+ ground state at positions in the absorption spectrum where Rydberg autoionizing resonance levels exist. The calculation could not distinguish between the various members of a particular series and hence the same distribution is attributed irrespective of principal quantum number. The resonances calculated are for the Tanaka-Ogawa series with vibrational levels of 0,1,2,3 quanta of the symmetric stretch in the ground electronic state of CO2+.