Jahn-Teller coupling and fragmentation after core-shell excitation in CF{sub 4} investigated by partial-ion-yield spectroscopy
- 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)
- Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003 (United States)
- 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, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.043427; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
CARBON
CARBON TETRAFLUORIDE
COUPLING
EXCITATION
EXCITED STATES
FLUORINE
ION SPECTROSCOPY
IONS
JAHN-TELLER EFFECT
MOLECULES
ORIENTATION
POLARIZATION
CHARGED PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
SPECTRA
SPECTROSCOPY