Abstract
The , , ) desorbates produced during low-energy (5–40 eV) electron-beam irradiation of amorphous O ice were monitored using resonance-enhanced laser ionization spectroscopy. We attribute the structure in the yield as a function of the incident electron energy to core-excited negative ion resonances. These resonances, or the excited states produced after electron autodetachment, decay via molecular elimination to yield directly. is observed with or 2 but not , suggesting a symmetry propensity in the excitation or decay of the resonances.
- Received 29 April 1996
DOI:https://doi.org/10.1103/PhysRevLett.77.3983
©1996 American Physical Society