Accession Number : ADA262129


Title :   Non-Adiabatic Curve Crossings in Dissociative Electron Attachment of Condensed O2


Descriptive Note : Technical rept.,


Corporate Author : GEORGE WASHINGTON UNIV WASHINGTON DC DEPT OF CHEMISTRY


Personal Author(s) : Sambe, Hideo ; Ramaker, David E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262129.pdf


Report Date : Dec 1992


Pagination or Media Count : 4


Abstract : Previously published data on electron stimulated desorption (ESD) from condensed O2 or O2+ in matrices have been analyzed. Dissociative electron attachment (DEA) via the 2 Sigma sub g(+) resonant state can result in two different dissociation products (i.e. by proceeding to the dissociation limits O(3p) + O(-)(2-P) and O* (1D) + O(-)2(P). The O* (1D) product requires dissociation via a non-adiabatic curve crossing. O (1D) is the dominant DEA product in gaseous O2. Upon condensation, O(3P) becomes the dominant product; however, the branching ratio depends strongly on the kinetic energy of the dissociating atoms.


Descriptors :   *OXYGEN , *ELECTRONS , *DESORPTION , *CONDENSATION , ATOMS , KINETIC ENERGY , CURVES(GEOMETRY) , ADIABATIC CONDITIONS , SEPARATION , CROSSINGS , DISSOCIATION


Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE