Vibrational excitation in the e + CO2 system: Analysis of the two-dimensional energy-loss spectrum

0566830 - ÚFCH JH 2023 RIV US eng J - Journal Article
Dvořák, J. - Ranković, Miloš - Houfek, K. - Nag, Pamir - Čurík, Roman - Fedor, Juraj - Čížek, M.
Vibrational excitation in the e + CO2 system: Analysis of the two-dimensional energy-loss spectrum.
Physical Review A. Roč. 106, č. 6 (2022), č. článku 062807. ISSN 2469-9926. E-ISSN 2469-9934
R&D Projects: GA ČR(CZ) GA20-11460S; GA ČR(CZ) GA21-12598S
Institutional support: RVO:61388955
Keywords : Electron energy levels * Electron energy loss spectroscopy * Energy dissipation
OECD category: Physical chemistry
Impact factor: 2.9, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevA.106.062807

We present a detailed analysis of the two-dimensional electron energy-loss spectrum of CO2, which extends our recent Letter [Phys. Rev. Lett. 129, 013401 (2022)0031-900710.1103/PhysRevLett.129.013401]. We show that our vibronic coupling model [Phys. Rev. A 105, 062821 (2022)2469-992610.1103/PhysRevA.105.062821] captures primary features of the multidimensional dynamics of the temporary molecular anion, and the calculations qualitatively reproduce the spectrum. The shape of the spectrum is given by two overlapping contributions that originate in excitation of vibrational states within ςg+ and Πu Fermi polyads. Propensity rules in terms of scattered and vibrational wave functions are also discussed to clarify the selectivity of states from the vibrational pseudocontinuum that is responsible for the observed fine structure.
Permanent Link: https://hdl.handle.net/11104/0338107