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Articles you may be interested inEffects of rotational, vibrational, and translational energy on the rate constants for the isotope exchange reactions OH−+D2 and OD−+H2 Temperature, kinetic energy, and internal energy dependences of the rate constant and branching fraction for the reaction of O+ (4 S) with CO2 Effect of reactant ion internal and translational energy on the rate constants of the charge exchange reactions: cot + 02---+0t + CO 2 and ot + O 2 ---+0 2 + otThe rate constants of the charge exchange reactions CO 2 + + O 2 -0 2 + + CO 2 and ot + 02~2 + ot have been studied as a function of both the internal and kinetic energies of the reactant ion in a tandem ICR spectrometer. Primary ions with known internal energies are formed in the source of the tandem by charge transfer reactions whose energy partitioning has already been determined. The rate constant of the cot + O 2 reaction is found to be 4.4 X 10-11 cm 3 S-I for ground state primary ions and increases by a factor of 2.9 when cot ions have 1.4 e V of internal energy; this reaction is also found to be much less sensitive to the kinetic energy of the parent ion than to its internal energy. The rate constant for the symmetric charge exchange reaction ot + O 2 has been determined for internal energies corresponding approximately to the v = 0, 3, and 9 vibrational levels of the ot ground electronic state and is found to increase with internal energy, at least at low collision energy.