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Mechanism for resonant O electron stimulated desorption from condensed O2. Non-adiabatic transitions and dynamics |
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| Authors: | Roger Azria Yvonnick Le Coat Jean-Pierre Ziesel Jean-Pierre Guillotin Brahim Mharzi Michel Tronc |
| Institution: | a Laboratoire de Collisions Atomiques et Moléculaires, Université Paris-Sud Bâtiment 351, 91405 Orsay, France b Laboratoire des Collisions, Agrégates et Réactivité IRSAMC, Université Paul Sabatier, 31062 Toulouse Cedex France c Laboratoire de Chimie Physique, Université Pierre et Marie Curie, 11 Rue Pierre et Marie Curie, 75231 Paris Cedex 05, France |
| Abstract: | Absolute kinetic energy distributions and yields associated with ground state 3P and excited state 1D oxygen atoms have been obtained for O? anion electron stimulated desorption from condensed O2 in the electron energy range 6–15 eV. The observed yields are understood as resulting essentially from dissociative electron attachment reactions via the two lowest 2Σ+g O?2 resonance states through adiabatic and non-adiabatic transitions to the limits O?(2P) + O(3P) and O?(2P) + O(1D). The kinetic energy distributions show the prominent role of electron multiple collision processes and post-dissociation interactions of the O? anions in the condensed phase. |
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