A high resolution pulsed field ionization photoelectron study of O{sub 2} using third generation undulator synchrotron radiation

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.473956· OSTI ID:496673

Hsu, C; Heimann, P ^[1]; Evans, M; Stimson, S; Fenn, P T; Ng, C Y ^[2]

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1. Chemical Sciences Division and Advanced Light Source, Accelerator and Fusion Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Ames Laboratory, United States Department of Energy

We have improved a newly developed experimental scheme for high resolution pulsed field ionization photoelectron (PFI-PE) studies [Hsu {ital et al.}, Rev. Sci. Instrum. (in press)] using the high resolution monochromatized multibunch undulator synchrotron source of the Chemical Dynamics Beamline at the Advanced Light Source. This improved scheme makes possible PFI-PE measurements with essentially no contamination by background electrons arising from direct photoionization and prompt autoionization processes. We present here a preliminary analysis of the rotationally resolved PFI-PE spectrum for O{sub 2} obtained at a resolution of 0.5 meV (full-width-at-half-maximum) in the photon energy range of 18.1{endash}19.4 eV, yielding accurate ionization energies for the transitions O{sub 2}{sup +}(b{sup 4}{Sigma}{sub g}{sup {minus}}, v{sup +}=0{endash}9, N{sup +}=1){l_arrow}O{sub 2}(X{sup 3}{Sigma}{sub g}{sup {minus}}, v=0, N=1). {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098; W-7405-ENG-82
• OSTI ID: 496673
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 21 Vol. 106; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ADVANCED LIGHT SOURCE
AUTOIONIZATION
IONIZATION POTENTIAL
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
SYNCHROTRON RADIATION