Angular distributions of vibrationally-resolved C 1s photoelectrons from fixed-in-space CO molecules: Vibrational effect in the shape-resonant C 1s photoionization of CO

J. Adachi, K. Hosaka, S. Furuya, K. Soejima, M. Takahashi, A. Yagishita, S. K. Semenov, N. A. Cherepkov

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We have measured vibrationally-resolved molecular-frame photoelectron angular distributions (MF-PAD) from the C 1s level of CO molecules in the σ shape resonance region. The MF-PAD's for vibrational levels (v f=0, 1, and 2) in the C 1s→εℓσ channel are apparently different one from another at each incident photon energy. These experimental MF-PAD's agree with the present theoretical results from averaging the nuclear distance dependent dipole matrix elements with the relaxed core Hartree-Fock calculations. The results show that the MF-PAD's sensitively depend on the vibrational levels. This means that the internuclear distance dependences of phases and of magnitudes of dipole matrix elements play a crucial role in the C 1s photoionization of CO.

Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume137-140
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Jul
Externally publishedYes

Keywords

  • Core-level photoelectron spectroscopy
  • Molecular photoionization dynamics
  • Shape resonance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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