Non-Franck-Condon behavior in the C 1s photoelectron spectrum of the methane molecule

K. Ueda, A. Pavlychev, E. Kukk, U. Hergenhahn, H. Yoshida, T. Sunami, F. Tahara, T. Tanaka, M. Kitajima, H. Tanaka, A. De Fanis, Y. Tamenori

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Vibrationally resolved carbon 1s photoelectron spectra of methane are measured over a photon energy range between 300 and 480 eV. The intensity ratios of the vibrational components vary significantly, exhibiting a minimum at about 330 eV. The observed non-FC distribution is tentatively explained as a result of the internal inelastic scattering of the photoelectron on valence electrons, which leads to the loss of the photoelectron current that depends on the vibrational excitation of the residual ion.

Original languageEnglish
Pages (from-to)33-36
Number of pages4
JournalChemical Physics Letters
Issue number1-3
Publication statusPublished - 2005 Aug 5
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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