Franck—Condon Factors in Ionization: Experimental Measurement Using Molecular Photoelectron Spectroscopy. II

1 February 1967

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 46 (3) , 1156-1160
https://doi.org/10.1063/1.1840783

Abstract

A 180° magnetic‐field electron velocity analyzer described in an earlier paper has been used to clarify the vibrational fine structure in the molecular photoelectron spectra which helium resonance line photons (hv=21.21 eV) excite in carbon dioxide, carbon oxysulfide, carbon disulfide, and nitrous oxide. Experimental Franck—Condon factors for ionization from the levels of CO₂ and N₂O lying just above 21.21 eV have been determined and compared in the case of two of the CO₂⁺ states (X, A) with calculated values. For COS only one state (C) could be analyzed and in CS₂ no detailed structure could be resolved. Vertical I.P. values have however now been recorded for all these levels.

Keywords

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