Article Dans Une Revue Communications Physics Année : 2024

Observation of molecular resonant double-core excitation driven by intense X-ray pulses

Eetu Pelimanni
Adam Fouda
  • Fonction : Auteur
Phay Ho
Thomas Baumann
Sergey Bokarev
Alberto De Fanis
  • Fonction : Auteur
Simon Dold
Gilbert Grell
  • Fonction : Auteur
Dimitrios Koulentianos
Tommaso Mazza
Michael Meyer
Ralph Püttner
Daniel Rivas
Björn Senfftleben
Linda Young
Gilles Doumy

Résumé

Abstract The ultrashort and intense pulses of X-rays produced at X-ray free electron lasers (XFELs) have enabled unique experiments on the atomic level structure and dynamics of matter, with time-resolved studies permitted in the femto- and attosecond regimes. To fully exploit them, it is paramount to obtain a comprehensive understanding of the complex nonlinear interactions that can occur at such extreme X-ray intensities. Herein, we report on the experimental observation of a resonant double-core excitation scheme in N 2 , where two 1 σ core-level electrons are resonantly promoted to unoccupied $$1{\pi }_{g}^{* }$$ 1 π g * molecular orbitals by a single few-femtosecond broad-bandwidth XFEL pulse. The production of these neutral two-site double core hole states is evidenced through their characteristic decay channels, which are observed in good agreement with high-level theoretical calculations. Such multi-core excitation schemes, benefiting from the high interaction cross sections and state- and site-selective nature of resonant X-ray interactions, should be generally accessible in XFEL irradiated molecules, and provide interesting opportunities for chemical analysis and for monitoring ultrafast dynamic processes.

Dates et versions

hal-05378605 , version 1 (23-11-2025)

Identifiants

Citer

Eetu Pelimanni, Adam Fouda, Phay Ho, Thomas Baumann, Sergey Bokarev, et al.. Observation of molecular resonant double-core excitation driven by intense X-ray pulses. Communications Physics, 2024, 7 (1), pp.341. ⟨10.1038/s42005-024-01804-5⟩. ⟨hal-05378605⟩
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