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Interference between One- and Two-Electron Channels in Resonant Inelastic X-Ray Scattering

Söderström, Johan ; Agåker, Marcus LU ; Liu, Ji Cai ; Tokushima, Takashi LU orcid ; Ghosh, Anirudha LU ; Såthe, Conny LU ; Wang, Jian LU ; Koudouridis, Andreas Pantelis Frey ; Grunwald-Delitz, Moritz and Baumann, Thomas M. , et al. (2025) In Physical Review Letters 135(23).
Abstract

Interference between scattering channels is observed in resonant inelastic x-ray scattering (RIXS) at the Ne K threshold. Final states with |2p-1np⟩ as the main configuration are populated via |1s-1n′p⟩ resonances, where large-amplitude one-electron (n′=n) channels interfere with small-amplitude two-electron (n′≠n) channels. The interference is manifested in an asymmetric line profile where the two-electron resonance occurs in the tail region of the one-electron resonance. In RIXS, this slowly varying tail plays the role of the continuum for the Fano effect. The asymmetric profile is well modeled by means of a single asymmetry parameter, determined by the amplitudes of the scattering channels and the energy separation between the... (More)

Interference between scattering channels is observed in resonant inelastic x-ray scattering (RIXS) at the Ne K threshold. Final states with |2p-1np⟩ as the main configuration are populated via |1s-1n′p⟩ resonances, where large-amplitude one-electron (n′=n) channels interfere with small-amplitude two-electron (n′≠n) channels. The interference is manifested in an asymmetric line profile where the two-electron resonance occurs in the tail region of the one-electron resonance. In RIXS, this slowly varying tail plays the role of the continuum for the Fano effect. The asymmetric profile is well modeled by means of a single asymmetry parameter, determined by the amplitudes of the scattering channels and the energy separation between the resonances.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
135
issue
23
article number
233001
publisher
American Physical Society
external identifiers
  • pmid:41418226
  • scopus:105023707221
ISSN
0031-9007
DOI
10.1103/c5mk-trlz
language
English
LU publication?
yes
id
69f0416e-34bf-496b-8d94-e992430d321b
date added to LUP
2026-01-13 14:57:58
date last changed
2026-01-27 16:20:57
@article{69f0416e-34bf-496b-8d94-e992430d321b,
  abstract     = {{<p>Interference between scattering channels is observed in resonant inelastic x-ray scattering (RIXS) at the Ne K threshold. Final states with |2p-1np⟩ as the main configuration are populated via |1s-1n′p⟩ resonances, where large-amplitude one-electron (n′=n) channels interfere with small-amplitude two-electron (n′≠n) channels. The interference is manifested in an asymmetric line profile where the two-electron resonance occurs in the tail region of the one-electron resonance. In RIXS, this slowly varying tail plays the role of the continuum for the Fano effect. The asymmetric profile is well modeled by means of a single asymmetry parameter, determined by the amplitudes of the scattering channels and the energy separation between the resonances.</p>}},
  author       = {{Söderström, Johan and Agåker, Marcus and Liu, Ji Cai and Tokushima, Takashi and Ghosh, Anirudha and Såthe, Conny and Wang, Jian and Koudouridis, Andreas Pantelis Frey and Grunwald-Delitz, Moritz and Baumann, Thomas M. and Meyer, Michael and Harder, Manuel and Yin, Zhong and Björneholm, Olle and Nordgren, Joseph and Fritzsche, Stephan and Kimberg, Victor and Rubensson, Jan Erik and Gel’mukhanov, Faris}},
  issn         = {{0031-9007}},
  language     = {{eng}},
  number       = {{23}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Interference between One- and Two-Electron Channels in Resonant Inelastic X-Ray Scattering}},
  url          = {{http://dx.doi.org/10.1103/c5mk-trlz}},
  doi          = {{10.1103/c5mk-trlz}},
  volume       = {{135}},
  year         = {{2025}},
}