TITLE

Vibrational state dependence of β and D asymmetry parameters: The case of the highest occupied molecular orbital photoelectron spectrum of methyl-oxirane

AUTHOR(S)
Contini, G.; Zema, N.; Turchini, S.; Catone, D.; Prosperi, T.; Carravetta, V.; Bolognesi, P.; Avaldi, L.; Feyer, V.
PUB. DATE
September 2007
SOURCE
Journal of Chemical Physics;9/28/2007, Vol. 127 Issue 12, p124310
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The β angular asymmetry and D dichroic asymmetry parameters of the methyl-oxirane highest occupied molecular orbital (HOMO) band have been experimentally investigated with vibrational resolution using synchrotron radiation. A theoretical calculation of the Franck-Condon factors between vibrational ground state and different ionic vibrational states, in the Born-Oppenheimer harmonic approximation, has been performed in order to gain information on the vibrational states mainly involved in the HOMO photoelectron band. The general good agreement between theoretical and experimental results allows a reliable assignment of the major features. The experimental determination of β and D shows their dependence on the different final vibrational states. This paper reports, for the first time, experimental evidence of the dependence of the dichroic D parameter on the vibrational excitation of the ion.
ACCESSION #
26911368

 

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