Abstract
We report vibrationally resolved results on 2a 2u −1 photoionization of C 6F 6. Vibrational branching ratios are determined for the ring breathing mode by measuring dispersed fluorescence spectra of the C 6F 6 + ( B ̃ 2 A 2 u → X ̃ 2 E 1 g ) transition. Data are presented in the excitation energy range from 20 to 35 eV, and the vibrational branching ratios show a striking departure from Franck–Condon behavior from 20 to 25 eV. This deviation is attributed to a shape resonance.
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