Collision-energy-resolved Penning ionization electron spectroscopy of bromomethanes (CH3Br, CH2Br2, and CHBr 3) by collision with He*(23S) metastable atoms

Naoki Kishimoto, Eiichi Matsumura, Koichi Ohno, Michael S. Deleuze

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The collision-energy-resolved Penning ionization electron spectroscopy was used for investigating the occurrence of ionization of bromomethanes upon collision with metastable He*(23S) atoms. Lone-pair (n Br) orbitals of Br4p characters were found to have larger ionization cross sections than σc-Br orbitals. The negative collision-energy dependence of the partial ionization cross sections associated to the S* band indicated an attractive interaction for the entrance channel. The results of the collision-energy dependence of the partial ionization cross sections shows that the interaction potential between the molecule and the He excited state atom is highly anisotropic.

Original languageEnglish
Pages (from-to)3074-3086
Number of pages13
JournalJournal of Chemical Physics
Volume121
Issue number7
DOIs
Publication statusPublished - 2004 Aug 15

ASJC Scopus subject areas

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

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