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 CO2 confirm that O2(+) is formed specifically in Auger decay from the C1s-π* and O1s-π* resonances. Molecular rearrangement occurs by bending in the resonant states, and O2(+) is produced by both single and double Auger decay. It is suggested that electron capture by C(+) after partial dissociation in the doubly ionized core of excited CO2(+), formed by shake-up in spectator resonant Auger decay, accounts for high kinetic energy and high internal energy in some C + O2(+) fragments.
Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, United Kingdom.
J H D
JH
Eland
Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala, Sweden.
S
S
Zagorodskikh
Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala, Sweden.
R J
RJ
Squibb
Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala, Sweden.
M
M
Mucke
Division of Synchrotron Radiation Research, Lund University, 221 00 Lund, Sweden.
S L
SL
Sorensen
Department of Physics and Astronomy, Uppsala University, 751 20 Uppsala, Sweden.
R
R
Feifel