Energy dependences of the reactions of Ar⁺ with H₂, N₂, CO, O₂, CO₂, N₂O, and COS

Reactions of Ar⁺ ions with H₂, N₂, O ₂, CO CO₂, N₂O, and COS have been meausred in a flow-drift tube at center-of-mass energies of 0.04-2.5 eV. The reactions with H₂ and COS are fast and show only small energy dependences. The reaction with N₂ is very slow at thermal energies and the rate coefficient increases very fast with increasing energy. The rate coefficients for the reactions with CO₂ and N₂O decrease with increasing energy over the whole energy range studied. For the reactions with O₂ and CO, we find minima of the rate coefficient at 0.4 and 0.8 eV, respectively, followed by a dramatic increase at higher energies.