Abstract
Total photoabsorption cross-sections and peak assignments were presented for C(1s) excited CF 3CN. It was found that fragmentation of the core-excited CF 3CN molecule competes with intramolecular energy redistribution on the basis of two measurements: One is the analysis of the kinetic energies of the CF 3 +, CF 2 +, CF +, F + and CN + fragment ions in angle-resolved mass spectra observed by using a linear time-of-flight mass spectrometer. This is the first observation that the kinetic energy distribution of fragment ions depends on the site of excitation. The other is site-selective photofragmentation by use of a reflectron type mass spectrometer. These experiments strongly suggest that the CF 3 group acts as an effective internal energy reservoir.
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