O 1s --> sigma* resonance in O2: inadequacy of only two exchange-split components.
The O 1s-->sigma* transition below the O K-edge in O2 has been investigated by absorption, constant ionic state (CIS) experiments, and extensive configuration interaction calculations. CIS scans of the three lowest-lying final states reached in resonant Auger decay provide a wealth of information on energy range, symmetry, and spin multiplicity of the intermediate states with sigma* character. We conclude that the identification of only two exchange-split components is inadequate because a complex manifold of states with sigma* character exists with no unique energy difference between related states.
Piancastelli
M N
MN
Department of Chemical Sciences and Technologies and INFM, University Tor Vergata, 00133 Rome, Italy.
Kivimäki
A
A
Carravetta
V
V
Cacelli
I
I
Cimiraglia
R
R
Angeli
C
C
Wang
H
H
Coreno
M
M
de Simone
M
M
Turri
G
G
Prince
K C
KC