Angle-resolved photoelectron spectroscopy of atomic oxygen

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.43.5997· OSTI ID:5665933

van der Meulen, P; Krause, M O ^[1]; de Lange, C A ^[2]

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1. Oak Ridge National Laboratory, Chemistry Division, P.O. Box 2008, Oak Ridge, Tennessee, 37831-6201 (USA)
2. Laboratory for Physical Chemistry, University of Amsterdam, Nieuwe Achtergracht 127, 1018WS Amsterdam, The Netherlands (NL)

Using synchrotron-radiation-based angle-resolved photoelectron spectroscopy, the relative partial photoionization cross sections for the production of the {sup 4}{ital So} and {sup 2}{ital Do} ionic states in atomic oxygen, as well as the corresponding asymmetry parameters, are measured from threshold at 13.62 to about 30 eV. The cross sections are placed on an absolute scale using previous data obtained with an electron spectroscopy modulation method. Attention is focused on the numerous autoionization resonances below the 2{ital p}{sup {minus}1} {sup 2}{ital Do}, 2{ital p}{sup {minus}1}{ital Po}, and 2{ital s}{sup {minus}1} {sup 4}{ital Pe} limits. The behavior of the asymmetry parameters across these resonances is observed for the first time. The 2{ital s}2{ital p}{sup 4}({sup 4}{ital Pe})3{ital p}({sup 3}{ital So}), {sup 3}{ital Po},({sup 3}{ital Do}) resonances are fitted by a Fano-type profile to obtain accurate values for the position, width, and {ital q} parameter.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5665933
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 43:11; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BRANCHING RATIO
BREMSSTRAHLUNG
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
IONIZATION
NONMETALS
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATIONS
RESONANCE
SPECTROSCOPY
SYNCHROTRON RADIATION