Vibronic Coupling through the Continuum in the e + CO2 System

0558725 - ÚFCH JH 2023 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GA21-12598S; GA ČR(CZ) GA20-11460S
Institucionální podpora: RVO:61388955
Klíčová slova: RESONANT ELECTRON-IMPACT * SHORT-LIVED STATES * VIBRATIONAL-EXCITATION
Obor OECD: Physical chemistry
Impakt faktor: 8.6, rok: 2022
Způsob publikování: 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.
Trvalý link: http://hdl.handle.net/11104/0332296