X-ray absorption spectroscopy of Ce2O3 + and Ce2O5 + near Ce M-edge

Tetsuichiro Hayakawa, Kazuhiro Egashira, Masashi Arakawa, Tomonori Ito, Shun Sarugaku, Kota Ando, Akira Terasaki

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11 Citations (Scopus)


X-ray absorption spectroscopy (XAS) of size-selected free cerium-oxide cluster ions has been carried out by employing an ion trap. X-ray absorption spectra of Ce2O3+ and Ce2O5+ were obtained in the energy range of the Ce M-edge. The spectra consisted of two prominent peaks corresponding to Ce M5- and M4- white line peaks. The photon energies of the peaks showed that the charge state of Ce in Ce2O3+ was comparable with a formal valence number. On the other hand, the estimated charge state of Ce in Ce2O5+ was much smaller than a formal valence number, which was consistently understood by assuming that Ce2O5+ has a Ce2O3-O2 configuration with a molecular O2 adsorbed. It was thus demonstrated that an ion trap facilitates XAS measurement for determining charge states of atoms in a free cluster.

Original languageEnglish
Article number075101
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number7
Publication statusPublished - Mar 16 2016

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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