Experimental Measurement of the ${\hbox {Ne}}^{+}$ and ${\hbox {Ne}}_{2}^{+}$ Mobilities in N

We measured the reduced mobilities of the atomic, Ne⁺, and dimer, Ne₂⁺, ions in Ne, under different pressures and reduced electric fields, at 300 K. Extrapolation to zero field yields values of 4.4 cm² V^-1 s^-1 for Ne⁺ and 6.2 cm² V^-1 s^-1 for Ne₂⁺, which are in relative good agreement with other published data. The Ne⁺ ions are converted to Ne₂⁺ by a three-body reaction with a rate constant that was also measured. Its average value for reduced electric fields in the 8 to 12 Td range was (5.6 ± 0.1) × 10^-32 cm⁶ s^-1 at 300 K, also agreeing with the results from other authors using other techniques.