Penning ionization electron spectroscopy of CO 2 clusters in collision with metastable rare gas atoms

Ryo Maruyama, Hideyasu Tanaka, Yoshihiro Yamakita, Fuminori Misaizu, Koichi Ohno

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Penning ionization electron spectra (PIES) of CO2 clusters have been observed for the first time. An unusually fast electron band with excess kinetic energies of 1.4-2.9 eV with respect to the monomer band for the ionic X state was observed for CO2 clusters in collision with He*(23S) atoms. While for PIES with Ne*(33P), no such unusual band was observed. The unusual band is ascribed to autoionization into stable structures of ionic clusters to which direct ionization processes are almost impossible due to very small Franck-Condon overlaps associated with a very large geometry difference between the ionic and neutral clusters.

Original languageEnglish
Pages (from-to)104-110
Number of pages7
JournalChemical Physics Letters
Issue number1-2
Publication statusPublished - 2000 Sep 1

ASJC Scopus subject areas

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

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