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One-electron versus multielectron effects in the near-threshold C 1s photoionization of acetylene (Articolo in rivista)

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One-electron versus multielectron effects in the near-threshold C 1s photoionization of acetylene (Articolo in rivista) (literal)

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B. Kempgens, A. Kivimäki, H. M. Köppe, M. Neeb, A. M. Bradshaw, J. Feldhaus (1997)
One-electron versus multielectron effects in the near-threshold C 1s photoionization of acetylene
in The Journal of chemical physics
(literal)

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B. Kempgens, A. Kivimäki, H. M. Köppe, M. Neeb, A. M. Bradshaw, J. Feldhaus (literal)

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Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany Hamburg Synchrotronstrahlungslabor HASYLAB am Deutschen Elektronen-Synchrotron DESY, Notkestrasse 85, 22603 Hamburg, Germany (literal)

Titolo

One-electron versus multielectron effects in the near-threshold C 1s photoionization of acetylene (literal)

Abstract

The C 1s partial photoionization cross section and asymmetry parameter ? of the C2H2 molecule have been determined with high-energy resolution between threshold and 360 eV. The C 1s shake-up satellite spectrum is richly structured; the cross section of several satellites increases strongly near threshold, which indicates that there is a conjugate contribution to their intensity. It is shown that the large enhancement in the total photoabsorption cross section between 305 and 320 eV, previously attributed to a ?* shape resonance, is largely due to this photon energy dependence of the shake-up transitions. (literal)

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