Electron spectroscopy using excited atoms and photons IX. Penning ionization of CO2, CS2, COS,N2O,H2S,SO2, and NO2 |
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Authors: | C.E. Brion D.S.C. Yee |
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Affiliation: | Department of Chemistry, University of British Columbia, Vancouver, B.C., V6T 1W5 Canada |
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Abstract: | The electron spectra resulting from thermal collisions of He* (predominantly 23S) metastable atoms with the seven triatomic molecules, CO2, COS, CS2, N2O H2S, SO2 and NO2, are compared with their respective 584-Å photoelectron spectra using a transmission-corrected electron spectrometer. The normalised relative electronic-state transition probabilities for production of ionic states in Penning ionization and photoionization are reported together with energy shifts (ΔE values) for He*(23S) Penning ionization. The cross-section for Penning ionization to lower states of NO2+ is extremely low as has been observed in other open shell molecules such as NO and O2. |
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