MEASUREMENT OF THE REACTION-RATE COEFFICIENTS OF REACTIONS OF H-2+ WITH NE, AR, KR, XE, H-2, D-2 N2 AND CH4 AT THERMAL-ENERGY

The reaction rate coefficients of the reactions of H-2+ (upsilon = 0, 1) ions with rare gas atoms Ne, Ar, Kr, Xe, and molecules H-2, D2, N2, O2 and CH4 at thermal energy have been measured in a Selected Ion Flow Tube (SIFT) experiment, with He as a carrier gas at 298 K. The obtained reaction rate coefficients are close to the collisional rate coefficients for most of the reactions studied. For the reaction of the H-2+ ions with Xe the reaction rate coefficient is a half of the collisional rate coefficient. Thermal reaction rate coefficients for the reactions of H+ with D2 and O2 are also reported.