Penning ionization of dichloroethylenes by collision with He*(23S) metastable atoms

Koichi Ohno, Naoki Kishimoto, Hideo Yamakado

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Penning ionization of trans-, cis-, and iso-dichloroethylenes upon collision with metastable He*(23S) atoms was studied by collision-energy resolved Penning ionization electron spectroscopy. Partial ionization cross sections are found to be larger for ionization from orbitals having Cl 3p characters. Out-of-plane molecular orbitals having Cl 3p characters are especially reactive with the metastable helium atom. Interaction potentials between the target molecules and the He* atom were found to be highly anisotropic. In the Penning ionization electron spectrum of iso-dichloroethylene, an extra band was found and ascribed to an electron correlation band due to a π-π* excitation upon ionization from the highest occupied π orbital.

Original languageEnglish
Pages (from-to)9687-9693
Number of pages7
JournalJournal of physical chemistry
Issue number24
Publication statusPublished - 1995 Jan 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Penning ionization of dichloroethylenes by collision with He*(23S) metastable atoms'. Together they form a unique fingerprint.

Cite this