MECHANISM FOR RESONANT O- ELECTRON-STIMULATED DESORPTION FROM CONDENSED O2 - NONADIABATIC TRANSITIONS AND DYNAMICS

Absolute kinetic energy distributions and yields associated with groun d state 3P and excited state 1D oxygen atoms have been obtained for O- anion electron stimulated desorption from condensed O2 in the electro n energy range 6-15 eV. The observed yields are understood as resultin g essentially from dissociative electron attachment reactions via the two lowest 2SIGMA(g)+ O2- resonance states through adiabatic and non-a diabatic transitions to the limits O-(2P) + O(3P) and O-(2P) + O(1D). The kinetic energy distributions show the prominent role of electron m ultiple collision processes and post-dissociation interactions of the O- anions in the condensed phase.