The production of NO₂⁻by electron transfer from O⁻, and O₂⁻, O₃⁻and OH⁻to NO₂

Abstract

Cross sections for several charge-transfer reactions have been measured in the energy range 2–400 ev using a crossed ion and neutral beam configuration and employing mass analysis of the product ions. The charge-transfer cross sections of O2 in collisions with O− and O2− were determined and the results compared with those obtained by using an electron-filter collision chamber. Reasons are given for the discrepancies that were noted. The collisions between NO2 and the negative ions O−, O2−, O3−, and OH− were studied, and all of these charge-transfer cross sections were found to be large and to increase with decreasing ion energy. The cross sections for the reactions leading to NO2− formation are extrapolated to interaction energies in the thermal energy range.