State-to-state collisional vibrational energy transfer in S1 p-difluorobenzene

State-to-state vibrational energy transfer from six levels in S 1 p-difluorobenzene (pDFB) vapor at 300 K has been studied for single collisions with argon atoms. The levels range in vibrational energy up to 818 cm -1 and involve quanta of ν 5 , ν 6 , ν 8 , and ν 30 . This investigation is a continuation of a previous study concerning the zero-point level. The study is based on a laser pump-dispersed fluorescence detection method that monitors all significant one-collision channels from a given initial state. In common with results from other studies of polyatomic vibrational energy transfer, large state-to-state rate constants (up to 0.2 times hard sphere) are observed with high selectivity among possible final states