Jahn-Teller coupling and fragmentation after core-shell excitation in CF{sub 4} investigated by partial-ion-yield spectroscopy

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.043427· OSTI ID:21450816

Guillemin, Renaud ^[1]; Stolte, Wayne C; Lindle, Dennis W ^[2]; Piancastelli, Maria Novella ^[3]

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1. Universite Pierre et Marie Curie, Laboratoire de Chimie Physique-Matiere et Rayonnement, UMR 7614, 11 rue Pierre et Marie Curie, FR-75231 Paris Cedex 05 (France)
2. Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003 (United States)
3. Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-75120 Uppsala (Sweden)

We investigate fragmentation processes induced by core-level photoexcitation in CF{sub 4} at both the carbon and fluorine K edges by means of partial-ion-yield spectroscopy. The molecule CF{sub 4} is a textbook example of systems in which Jahn-Teller coupling strongly manifests itself in the photoabsorption spectrum. Spectral features related to Jahn-Teller and quasi-Jahn-Teller splitting are observed, and important differences in the fragmentation pathways are revealed depending on the symmetries of the core-excited states. We interpret these experimental observations on the grounds of symmetry lowering from the T{sub d} to the C{sub 3v} point group as well as preferential orientation with respect to the polarization vector of the incident radiation.

• OSTI ID: 21450816
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
CARBON
CARBON TETRAFLUORIDE
CHARGED PARTICLES
COUPLING
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENS
ION SPECTROSCOPY
IONS
JAHN-TELLER EFFECT
MOLECULES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORIENTATION
POLARIZATION
SPECTRA
SPECTROSCOPY