Abstract
High resolution helium Iα (584 Å) photoelectron spectra of H 2CCO and D 2CCO using supersonic molecular beams are reported. The adiabatic ionization energies (AIEs) of the electronic first, second, and fifth excited states are determined unambiguously. The doublet-like fine structures observed in the first excited states of ketene imply the excitation of a “soft” mode that was not observed before. Strong isotope effects are observed in the vibronic (vibrational) couplings in the ground state of ketene cations. The AIEs and spectroscopic constants for all six ionic states are reported to a much higher accuracy than previously available.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
