Collisional Detachment Studies of NO−

Abstract

Rate constants for collisional detachment of NO⁻, $${\mathrm{NO}}^{-}+\mathrm{X}\to \mathrm{NO}+\mathrm{X}\mathrm{+\; e}$$ , have been measured from 193 to 506°K for X as He, Ne, H₂, NO, CO, CO₂, N₂O, and NH₃. The data fit Arrhenius plots $k_d{\mathrm{=Ae}}^{\mathrm{-E/kT}}$ with both A and E showing large variations with X. From equilibrium constant considerations, electron attachment rates to NO have been calculated. An estimate for the electron affinity of NO₃ is obtained from some auxiliary considerations. Rate constants for the charge‐transfer reactions of NO⁻ with O₂ and NO₂ were found to be 5 and ${\text{7.4 × 10}}^{\text{−10}}\hspace{0.17em}{\mathrm{cm}}^3{\sec }^{\text{−1}}$ , respectively.