Core-valence double photoionization of the CS(2) molecule.
Double photoionization spectra of the CS(2) molecule have been recorded using the TOF-PEPECO technique in combination with synchrotron radiation at the photon energies hν=220, 230, 240, 243, and 362.7 eV. The spectra were recorded in the S 2p and C 1s inner-shell ionization regions and reflect dicationic states formed out of one inner-shell vacancy and one vacancy in the valence region. MCSCF calculations were performed to model the energies of the dicationic states. The spectra associated with a S 2p vacancy are well structured and have been interpreted in some detail by comparison to conventional S 2p and valence photoelectron spectra. The lowest inner-shell-valence dicationic state is observed at the vertical double ionization energy 188.45 eV and is associated with a (2p(3/2))(-1)(2π(g))(-1) double vacancy. The spectrum connected to the C 1s vacancy shows a distinct line at 310.8 eV, accompanied by additional broad features at higher double ionization energies. This line is associated with a (C 1s)(-1)(2π(g))(-1) double vacancy.
Andersson
E
E
Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.
Niskanen
J
J
Hedin
L
L
Eland
J H D
JH
Linusson
P
P
Karlsson
L
L
Rubensson
J-E
JE
Carravetta
V
V
Agren
H
H
Feifel
R
R
D002246:Carbon Disulfide / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D017785:Photons; D013057:Spectrum Analysis
D007477:Ions; D002246:Carbon Disulfide