Crossed Beam Study on the F+D2→ DF+D Reaction at Hyperthermal Collision Energy of 23.84 kJ/mol

摘要

We presented an experimental apparatus combining the H-atom Rydberg tagging time-of-flight technique and the laser detonation source for studying crossed beam reactions at hyperthermal collision energies.The preliminary study of the F+D2→ DF+D reaction at hyperthermal collision energy of 23.84 kJ/mol was performed.Two beam sources were used in this study:one is the hyperthermal F beam source produced by a laser detonation process,and the other is D2 beam source generated by liquid-N2 cooled pulsed valve.Vibrational state-resolved differential cross sections (DCSs) of product for the title reaction were determined.From the product vibrational state-resolved DCS,it can be concluded that products DF(v'=0,1,2,3) are predominantly distributed in the sideway and backward scattering directions at this collision energy.However,the highest vibrational excited product DF(v'=4),is clearly peaked in the forward direction.The probable dynamical origins for these forward scattering products were analyzed and discussed.