The O 1s.s* Resonance in O2: exchange splitting revisited

The O 1s" border=0 src="http://ojps.aip.org/stockgif2/rarr.gif"* 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 * character. We conclude that the identification of only two exchange-split components is inadequate because a complex manifold of states with * character exists with no unique energy difference between related states.