Symmetry-resolved x-ray absorption spectroscopy has been first carried out on high-temperature molecules. From the angle-resolved ion yield spectra of CO2 both at room temperature and at 430°C, symmetry-resolved absorption profiles of the C 1s-12πu and O 1s-12πu resonances have been extracted for the vibrational ground state molecules and bending-vibration excited ones. The profiles change dramatically between them, and the Renner-Teller effect becomes more evident for the vibrationally excited molecules. The effects of the multimode vibronic coupling are suggested for the O 1s-12πu and O 1s-13sσg resonances.
ASJC Scopus subject areas
- Physics and Astronomy(all)