Mechanism for resonant O− electron stimulated desorption from condensed O2. Non-adiabatic transitions and dynamics

✍ Scribed by Roger Azria; Yvonnick Le Coat; Jean-Pierre Ziesel; Jean-Pierre Guillotin; Brahim Mharzi; Michel Tronc

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 501 KB
• Volume: 220
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)00191-x

✦ Synopsis

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Absolute kinetic energy distributions and yields associated with ground state 3P and excited state 'D oxygen atoms have been obtained for O-anion electron stimulated desorption from condensed O2 in the electron energy range 6-l 5 eV. The observed yields are understood as resulting essentially from dissociative electron attachment reactions via the two lowest 'El 0, resonance states through adiabatic and non-adiabatic transitions to the limits 0 -( 'P ) + 0 (3P) and O-('P ) + 0 ( ID). 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. ' Unit6 de Recherche associ6e au CNR+Y URA 028 1. of steps leading to anion emergence into vacuum ' Unite de Recherche associ6e au CNRS URA 0 176. cannot be easily established from total yields, kinetic