Studies of Ion—Neutral Reactions by a Photoionization Mass-Spectrometer Technique. II. Charge-Transfer Reactions of Argon Ions at Near-Thermal Energies

Abstract

A photoionization mass spectrometer has been employed to study charge transfer involving ²P_3/2 argon ions at ion‐source pressures 15 to 60 μ and with a source acceleration potential of 0.5 eV. The average energy of the reacting ions are calculated and are found to be less than 0.17 eV. The following rate constants were obtained: A⁺+NO→A+NO⁺, k=3.9×10⁻¹⁰ cc/molecule·sec; A⁺+O₂→A+O₂⁺, k=1.1×10⁻¹⁰ cc/molecule·sec; A⁺+CO₂→A+CO₂⁺, k=7.0×10⁻¹⁰ cc/molecule·sec; A⁺+CO→A+CO⁺, k=1.25×10⁻¹⁰ cc/molecule·sec; A⁺+N₂→A+N₂⁺, k=0.66×10⁻¹⁰ cc/molecule·sec. The theoretical implications are discussed.