High-resolution He Iα photoelectron spectroscopy of H2CO and D2CO using supersonic molecular beams
High-resolution helium Iα (584 Å) photoelectron spectra of H 2 CO and D 2 CO using
supersonic molecular beams are reported. The excitation of the ν 4 out-of-plane bending
mode in the ionic ground state and the first excited state imply that formaldehyde cations in
these states might have non-planar equilibrium geometries. The different vibrational
progressions observed in the first and second excited states indicate strong isotope effects
on vibrational (vibronic) couplings. The adiabatic ionization energies and spectroscopic …
supersonic molecular beams are reported. The excitation of the ν 4 out-of-plane bending
mode in the ionic ground state and the first excited state imply that formaldehyde cations in
these states might have non-planar equilibrium geometries. The different vibrational
progressions observed in the first and second excited states indicate strong isotope effects
on vibrational (vibronic) couplings. The adiabatic ionization energies and spectroscopic …