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Title: Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV

Abstract

We have obtained rotationally resolved pulsed field ionization-photoelectron (PFI-PE) spectra of O{sub 2} in the energy range of 16.0-18.0 eV, covering ionization transitions O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18,J{sup +})(<-)O{sub 2}(X {sup 3}{sigma}{sub g}{sup .}, v{sup ''}=0,N{sup ''}). Although these vibrational PFI-PE bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}) have significant overlaps with those for O{sub 2}{sup +}(X {sup 2}{pi}{sub g}) and O{sub 2}{sup +}(A {sup 2}{pi}{sub u}), we have identified all O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) bands by simulation of spectra obtained using supersonically cooled O{sub 2} samples with rotational temperatures {approx_equal}20 and 220 K. While the v{sup +}=4-18PFI-PE bands represent the first rotationally resolved photoelectron data for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}), the PFI-PE bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=10-18) are the first rotationally resolved spectroscopic data for these levels. The simulation also allows the determination of accurate ionization energies, vibrational constants, and rotational constants for O{sub 2}{sup +}(a {sup 2}{pi}{sub u}, v{sup +}=0-18). The observed intensities of spin-orbit components for the majority of O{sub 2}{sup +}(a {sup 2}{pi}{sub u}, v{sup +}) vibrational bands are in accordance with the forced spin-orbit/rotational autoionization mechanism. (c) 2000more » American Institute of Physics.« less

Authors:
 [1];  [1];  [1];  [2];  [2]
  1. Ames Laboratory, USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011 (United States)
  2. Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Publication Date:
OSTI Identifier:
20215054
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 112; Journal Issue: 3; Other Information: PBD: 15 Jan 2000; Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; PHOTOELECTRON SPECTROSCOPY; OXYGEN IONS; CATIONS; MOLECULAR IONS; ROTATIONAL STATES; VIBRATIONAL STATES; PHOTOIONIZATION; IONIZATION POTENTIAL; L-S COUPLING; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Song, Y, Evans, M, Ng, C Y, Hsu, C -W, and Jarvis, G K. Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV. United States: N. p., 2000. Web. doi:10.1063/1.480682.
Song, Y, Evans, M, Ng, C Y, Hsu, C -W, & Jarvis, G K. Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV. United States. https://doi.org/10.1063/1.480682
Song, Y, Evans, M, Ng, C Y, Hsu, C -W, and Jarvis, G K. 2000. "Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV". United States. https://doi.org/10.1063/1.480682.
@article{osti_20215054,
title = {Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV},
author = {Song, Y and Evans, M and Ng, C Y and Hsu, C -W and Jarvis, G K},
abstractNote = {We have obtained rotationally resolved pulsed field ionization-photoelectron (PFI-PE) spectra of O{sub 2} in the energy range of 16.0-18.0 eV, covering ionization transitions O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18,J{sup +})(<-)O{sub 2}(X {sup 3}{sigma}{sub g}{sup .}, v{sup ''}=0,N{sup ''}). Although these vibrational PFI-PE bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}) have significant overlaps with those for O{sub 2}{sup +}(X {sup 2}{pi}{sub g}) and O{sub 2}{sup +}(A {sup 2}{pi}{sub u}), we have identified all O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) bands by simulation of spectra obtained using supersonically cooled O{sub 2} samples with rotational temperatures {approx_equal}20 and 220 K. While the v{sup +}=4-18PFI-PE bands represent the first rotationally resolved photoelectron data for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}), the PFI-PE bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=10-18) are the first rotationally resolved spectroscopic data for these levels. The simulation also allows the determination of accurate ionization energies, vibrational constants, and rotational constants for O{sub 2}{sup +}(a {sup 2}{pi}{sub u}, v{sup +}=0-18). The observed intensities of spin-orbit components for the majority of O{sub 2}{sup +}(a {sup 2}{pi}{sub u}, v{sup +}) vibrational bands are in accordance with the forced spin-orbit/rotational autoionization mechanism. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.480682},
url = {https://www.osti.gov/biblio/20215054}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 3,
volume = 112,
place = {United States},
year = {Sat Jan 15 00:00:00 EST 2000},
month = {Sat Jan 15 00:00:00 EST 2000}
}