Photoelectron-photoion-photoion momentum spectroscopy as a direct probe of the core-hole localization in C 1s photoionization of C2H2

Jun Ichi Adachi, Kouichi Hosaka, Takahiro Teramoto, Masakazu Yamazaki, Noboru Watanabe, Masahiko Takahashi, Akira Yagishita

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Angular distributions of C 1s photoelectrons, relative to a dissociation axis for C2H2, have been measured with a photoelectron-photoion-photoion coincidence technique. The photoelectron angular distribution (PAD) for three two-body fragmentations (symmetric, non-symmetric and proton-migration fragmentations) is completely different. The PADs for non-symmetric fragmentation provide direct evidence of a localized core-hole and preferential bond breaking following Auger decays. Moreover, the PAD for symmetric fragmentation has been interpreted as the interference between photoemissions from the two carbon atoms.

Original languageEnglish
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume40
Issue number20
DOIs
Publication statusPublished - 2007 Oct 28

ASJC Scopus subject areas

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

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