The fragmentation of C 2F 6+

Abstract

The fragmentation Of C 2F 6 + has been studied by threshold photoelectron—photoion coincidence mass spectrometry and field-ionization mass spectrometry. Four types of data were obtained with the coincidence apparatus: threshold photoelectron spectra, fragmentation breakdown curves, time-dependent breakdown curves and kinetic energy release on fragmentation. The results indicate that the CF 3 + and C 2F 5 + fragments are formed independently, probably from separate electronic states which do not internally convert to the ground electronic state. The field-ionization data show that these fragments are formed in less than 5 × 10 −13 s. Quasi-equilibrium calculations could not reproduce the experimental results.