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Resonant inelastic x-ray scattering and photoemission measurement of O2: Direct evidence for dependence of Rydberg-valence mixing on vibrational states in O 1 s → Rydberg states
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2017 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 147, no 4, article id 044310Article in journal (Refereed) Published
Abstract [en]

High-resolution resonant inelastic x-ray scattering (RIXS) and low-energy photoemission spectra of oxygen molecules have been measured for investigating the electronic structure of Rydberg states in the O 1s → σ∗ energy region. The electronic characteristics of each Rydberg state have been successfully observed, and new assignments are made for several states. The RIXS spectra clearly show that vibrational excitation is very sensitive to the electronic characteristics because of Rydberg-valence mixing and vibronic coupling in O2. This observation constitutes direct experimental evidence that the Rydberg-valence mixing characteristic depends on the vibrational excitation near the avoided crossing of potential surfaces. We also measured the photoemission spectra of metastable oxygen atoms (O) from O2 excited to 1s → Rydberg states. The broadening of the 4p Rydberg states of O∗ has been found with isotropic behavior, implying that excited oxygen molecules undergo dissociation with a lifetime of the order of 10 fs in 1s → Rydberg states.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017. Vol. 147, no 4, article id 044310
Keywords [en]
Electronic structure, Excited states, Mixing, Molecules, Oxygen, Photoemission, Rydberg states
National Category
Other Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-212280DOI: 10.1063/1.4994895ISI: 000414205100010Scopus ID: 2-s2.0-85026498654OAI: oai:DiVA.org:kth-212280DiVA, id: diva2:1133845
Funder
Knut and Alice Wallenberg Foundation, 2013.0020Swedish Research Council, 2015-04510
Note

QC 20170817

Available from: 2017-08-17 Created: 2017-08-17 Last updated: 2017-11-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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Output format
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