Negative ion reactions in N2O at low energies

Abstract

The reaction of O⁻ with N₂O has been studied as a function of temperature and O⁻ kinetic energy using ion cyclotron resonance and flowing afterglow techniques. The reaction has a measured rate constant at room temperature of $\text{2.2± 0.4}{\mathrm{cm}}^3/\sec$ in the flowing afterglow and ${\text{2.5± 0.5 × 10}}^{\text{−10}}{\mathrm{cm}}^3/\sec$ in the ICR. As the O⁻ energy is increased the rate constant declines. Over the entire range of energies NO⁻ is the only observed reaction product. Energy exchange between O⁻ and N₂O and Ar have also been studied as well as reactions involving the NO⁻ product of the O⁻ reaction with N₂O. The present results are compared with previous results.