title: Symmetry-resolved absorption spectra of vibrationally excited CO2 molecules.
abstract: 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 degrees C, symmetry-resolved absorption profiles of the C 1s(-1) 2pi(u) and O 1s(-1) 2pi(u) 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(-1) 2pi(u) and O 1s(-1) 3s sigma(g) resonances.
authors.affiliation: Department of Physics, Sophia University, Tokyo 102-8554, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: C
authors.initials: C
authors.lastname: Makochekanwa
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: M
authors.initials: M
authors.lastname: Kitajima
authors.forename: M
authors.initials: M
authors.lastname: Hoshino
authors.forename: Y
authors.initials: Y
authors.lastname: Tamenori
authors.forename: E
authors.initials: E
authors.lastname: Kukk
authors.forename: X J
authors.initials: XJ
authors.lastname: Liu
authors.forename: G
authors.initials: G
authors.lastname: Prümper
authors.forename: K
authors.initials: K
authors.lastname: Ueda