Temperature Variation of Ionic Mobilities in Hydrogen

Measurements have been made of the temperature variation of the mobilities of positive ions in hydrogen over the range 77^∘{}-300^∘{}K. The zero-field mobility values are μ₀=12.3 cm²/v sec (300^∘{}K), 13.3 (195^∘{}K), and 13.0 (77^∘{}K). The present results at 300^∘{}K are in agreement with the data of Lauer, Bradbury, and Mitchell at low Ep₀, and at high Ep₀ agree with Rose's measurements. Only a single ion species was observed in the present studies. Reasons are given which support the belief that the ion observed in these measurements was H₃⁺.