Collision-energy-resolved Penning ionization electron spectroscopy of OCS with He*(23S) metastable atoms

Naoki Kishimoto, Takuya Horio, Satoshi Maeda, Koichi Ohno

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Collision-energy dependence of partial Penning ionization cross-sections (CEDPICS) of OCS was obtained from collision-energy/electron-energy-resolved two-dimensional spectrum with a highly sensitive electron energy analyzer. The negative CEDPICS for X2Π and C2Σ+ states indicates attractive interaction around S and O atoms with He *(23S), where the corresponding 3π(S 3p-O2p) and 8σ(σCO) orbitals extend, respectively. Utilizing classical trajectory calculations for CEDPICS and optimization of model potential energy surface, a large ring-like attractive well with a depth of ca. 120 meV was found for perpendicular directions around C S axis and smaller interaction was found in the collinear direction of the C O axis with well depth of ca. 70 meV around the oxygen atom in the lone pair region by sp2 hybridization.

Original languageEnglish
Pages (from-to)332-339
Number of pages8
JournalChemical Physics Letters
Volume379
Issue number3-4
DOIs
Publication statusPublished - Sep 26 2003
Externally publishedYes

Fingerprint

metastable atoms
Electron spectroscopy
Ionization
electron spectroscopy
ionization cross sections
ionization
Atoms
collisions
Electron energy analyzers
Potential energy surfaces
electron energy
Carbon Monoxide
energy
Trajectories
Oxygen
oxygen atoms
analyzers
Electrons
potential energy
trajectories

All Science Journal Classification (ASJC) codes

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

Cite this

Collision-energy-resolved Penning ionization electron spectroscopy of OCS with He*(23S) metastable atoms. / Kishimoto, Naoki; Horio, Takuya; Maeda, Satoshi; Ohno, Koichi.

In: Chemical Physics Letters, Vol. 379, No. 3-4, 26.09.2003, p. 332-339.

Research output: Contribution to journalArticle

Kishimoto, Naoki ; Horio, Takuya ; Maeda, Satoshi ; Ohno, Koichi. / Collision-energy-resolved Penning ionization electron spectroscopy of OCS with He*(23S) metastable atoms. In: Chemical Physics Letters. 2003 ; Vol. 379, No. 3-4. pp. 332-339.
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