O 1s --> sigma* resonance in O2: inadequacy of only two exchange-split components.
Piancastelli MN, Kivimäki A, Carravetta V, Cacelli I, Cimiraglia R, Angeli C, Wang H, Coreno M, de Simone M, Turri G, Prince KC.
Piancastelli MN, et al. Among authors: angeli c.
Phys Rev Lett. 2002 Jun 17;88(24):243002. doi: 10.1103/PhysRevLett.88.243002. Epub 2002 Jun 3.
Phys Rev Lett. 2002.
PMID: 12059294