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We have measured electronic excitation differential cross sections for C4F6 molecules isomers by electron impact. In the case of hexafluoro-1,3-butadiene we observed an optical forbidden transition at around 5 eV. The spectra of the three C4F6 isomers show the most intense band clearly shifted to lower energies when going from 2-C 4F6, to c-C4F6 and to 1,3-C 4F6.
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General Physics and Astronomy
