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Title: Carbon dioxide ion dissociations after inner shell excitation and ionization: The origin of site-specific effects

Multi-coincidence experiments with detection of both electrons and ions from decay of core-excited and core-ionized states of CO{sub 2} confirm that O{sub 2}{sup +} is formed specifically in Auger decay from the C1s-π* and O1s-π* resonances. Molecular rearrangement occurs by bending in the resonant states, and O{sub 2}{sup +} is produced by both single and double Auger decay. It is suggested that electron capture by C{sup +} after partial dissociation in the doubly ionized core of excited CO{sub 2}{sup +}, formed by shake-up in spectator resonant Auger decay, accounts for high kinetic energy and high internal energy in some C + O{sub 2}{sup +} fragments.
Authors:
 [1] ;  [2] ; ;  [3] ; ;  [3] ;  [2] ;  [4]
  1. Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ (United Kingdom)
  2. (Sweden)
  3. Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala (Sweden)
  4. Division of Synchrotron Radiation Research, Lund University, 221 00 Lund (Sweden)
Publication Date:
OSTI Identifier:
22252881
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 140; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON DIOXIDE; DETECTION; DISSOCIATION; ELECTRON CAPTURE; ELECTRONS; INNER-SHELL EXCITATION; KINETIC ENERGY