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Vibronic Coupling through the Continuum in the e + CO2 System
- 1.0558725 - ÚFCH JH 2023 RIV US eng J - Journal Article
Dvořák, J. - Ranković, Miloš - Houfek, K. - Nag, Pamir - Čurík, Roman - Fedor, Juraj - Čížek, M.
Vibronic Coupling through the Continuum in the e + CO2 System.
Physical Review Letters. Roč. 129, č. 1 (2022), č. článku 013401. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR(CZ) GA21-12598S; GA ČR(CZ) GA20-11460S
Institutional support: RVO:61388955
Keywords : RESONANT ELECTRON-IMPACT * SHORT-LIVED STATES * VIBRATIONAL-EXCITATION
OECD category: Physical chemistry
Impact factor: 8.6, year: 2022
Method of publishing: Open access
We report two-dimensional electron energy-loss spectra of CO2. The high-resolution experiment reveals a counterintuitive fine structure at energy losses where CO2 states form a vibrational pseudocontinuum. Guided by the symmetry of the system, we constructed a four-dimensional nonlocal model for the vibronic dynamics involving two shape resonances (forming a Renner-Teller Πu doublet at the equilibrium geometry) coupled to a virtual Σ+g state. The model elucidates the extremely non-Born-Oppenheimer dynamics of the coupled nuclear motion and explains the origin of the observed structures. It is a prototype of the vibronic coupling of metastable states in continuum.
Permanent Link: http://hdl.handle.net/11104/0332296
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