O 1s excitation and ionization processes in the CO2 molecule studied via detection of low-energy fluorescence emission

Kivimäki, A. and Alvarez Ruiz, Jesus and Wasowicz, T.J. and Callegari, C. and Simone, M. de and Alagia, M. and Ritchter, R. and Coreno, M. (2011). O 1s excitation and ionization processes in the CO2 molecule studied via detection of low-energy fluorescence emission. "Journal of Physics B: Atomic, Molecular and Optical Physics", v. 44 (n. 16); pp.. ISSN 0953-4075. https://doi.org/10.1088/0953-4075/44/16/165103.

Description

Title: O 1s excitation and ionization processes in the CO2 molecule studied via detection of low-energy fluorescence emission
Author/s:
  • Kivimäki, A.
  • Alvarez Ruiz, Jesus
  • Wasowicz, T.J.
  • Callegari, C.
  • Simone, M. de
  • Alagia, M.
  • Ritchter, R.
  • Coreno, M.
Item Type: Article
Título de Revista/Publicación: Journal of Physics B: Atomic, Molecular and Optical Physics
Date: 2011
ISSN: 0953-4075
Volume: 44
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Oxygen 1s excitation and ionization processes in the CO2 molecule have been studied with dispersed and non-dispersed fluorescence spectroscopy as well as with the vacuum ultraviolet (VUV) photon?photoion coincidence technique. The intensity of the neutral O emission line at 845 nm shows particular sensitivity to core-to-Rydberg excitations and core?valence double excitations, while shape resonances are suppressed. In contrast, the partial fluorescence yield in the wavelength window 300?650 nm and the excitation functions of selected O+ and C+ emission lines in the wavelength range 400?500 nm display all of the absorption features. The relative intensity of ionic emission in the visible range increases towards higher photon energies, which is attributed to O 1s shake-off photoionization. VUV photon?photoion coincidence spectra reveal major contributions from the C+ and O+ ions and a minor contribution from C2+. No conclusive changes in the intensity ratios among the different ions are observed above the O 1s threshold. The line shape of the VUV?O+ coincidence peak in the mass spectrum carries some information on the initial core excitation

Funding Projects

TypeCodeAcronymLeaderTitle
FP7226716ELISAUnspecifiedEuropean Light Sources Activities - Synchrotrons and Free Electron Lasers

More information

Item ID: 12282
DC Identifier: http://oa.upm.es/12282/
OAI Identifier: oai:oa.upm.es:12282
DOI: 10.1088/0953-4075/44/16/165103
Official URL: http://iopscience.iop.org/0953-4075/44/16/165103/
Deposited by: Memoria Investigacion
Deposited on: 14 Aug 2012 09:00
Last Modified: 26 Jan 2015 11:55
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