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Resonant inelastic x-ray scattering on CO2 : Parity conservation in inversion-symmetric polyatomics

Söderström, Johan ; Stefanuik, Robert ; Hennies, Franz LU ; Schmitt, Thorsten LU ; Strocov, Vladimir N. ; Andersson, Joakim ; Kennedy, Brian LU ; Schlappa, Justine ; Föhlisch, Alexander and Pietzsch, Annette LU , et al. (2020) In Physical Review A 101(6).
Abstract

Resonant inelastic x-ray scattering (RIXS) spectra excited at the oxygen K edge of CO2 are presented and discussed. Although excitation from a gerade initial state to the intermediate 1s-1π∗ state breaks the inversion symmetry due to strong vibronic coupling, RIXS excited at the corresponding resonance exclusively populates gerade vibrations in the gerade electronic ground state. This observation constitutes an experimental confirmation of the prediction that the parity selection rule applies in RIXS on an inversion-symmetric polyatomic system, provided that the total electronic-vibronic wave function is considered. Parity selectivity is used for assigning spectra to the population of electronically excited final states, a procedure... (More)

Resonant inelastic x-ray scattering (RIXS) spectra excited at the oxygen K edge of CO2 are presented and discussed. Although excitation from a gerade initial state to the intermediate 1s-1π∗ state breaks the inversion symmetry due to strong vibronic coupling, RIXS excited at the corresponding resonance exclusively populates gerade vibrations in the gerade electronic ground state. This observation constitutes an experimental confirmation of the prediction that the parity selection rule applies in RIXS on an inversion-symmetric polyatomic system, provided that the total electronic-vibronic wave function is considered. Parity selectivity is used for assigning spectra to the population of electronically excited final states, a procedure hampered only when symmetry-breaking vibronic coupling in the final states is prominent. A RIXS spectrum excited in the Rydberg region is tentatively assigned using a simplified quasi-two-step model in which it is assumed that the electron in the Rydberg orbital excited in the first step remains as a spectator during the second decay step.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
101
issue
6
article number
062501
publisher
American Physical Society
external identifiers
  • scopus:85087591905
ISSN
2469-9926
DOI
10.1103/PhysRevA.101.062501
language
English
LU publication?
yes
id
a1260b07-26f5-4460-9a2c-b4b67ea1d84c
date added to LUP
2021-01-12 09:26:43
date last changed
2022-08-23 11:19:34
@article{a1260b07-26f5-4460-9a2c-b4b67ea1d84c,
  abstract     = {{<p>Resonant inelastic x-ray scattering (RIXS) spectra excited at the oxygen K edge of CO2 are presented and discussed. Although excitation from a gerade initial state to the intermediate 1s-1π∗ state breaks the inversion symmetry due to strong vibronic coupling, RIXS excited at the corresponding resonance exclusively populates gerade vibrations in the gerade electronic ground state. This observation constitutes an experimental confirmation of the prediction that the parity selection rule applies in RIXS on an inversion-symmetric polyatomic system, provided that the total electronic-vibronic wave function is considered. Parity selectivity is used for assigning spectra to the population of electronically excited final states, a procedure hampered only when symmetry-breaking vibronic coupling in the final states is prominent. A RIXS spectrum excited in the Rydberg region is tentatively assigned using a simplified quasi-two-step model in which it is assumed that the electron in the Rydberg orbital excited in the first step remains as a spectator during the second decay step.</p>}},
  author       = {{Söderström, Johan and Stefanuik, Robert and Hennies, Franz and Schmitt, Thorsten and Strocov, Vladimir N. and Andersson, Joakim and Kennedy, Brian and Schlappa, Justine and Föhlisch, Alexander and Pietzsch, Annette and Rubensson, Jan Erik}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Resonant inelastic x-ray scattering on CO2 : Parity conservation in inversion-symmetric polyatomics}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.101.062501}},
  doi          = {{10.1103/PhysRevA.101.062501}},
  volume       = {{101}},
  year         = {{2020}},
}