Drift velocity and DT/μ ratio for electrons in a 0.5% hydrogen-xenon mixture at 295 K

The momentum transfer cross section for electron in xenon, σm, has been studied using electron transport coefficient measurements for a dilute hydrogen-xenon mixture (0.46% H2 - 99.53% Xe). Drift velocity measurements were made using the Bradbury-Nielsen time-of-flight method at E/N values from 0.12 to 2.50 Td, pressures from 10.3 to 94.0 kPa and a temperature of 295 K. The ratio DT/μ (where DT is the transverse diffusion coefficient and μ the electron mobility) was measured using a Townsend-Huxley diffusion chamber at E/N values from 0.035 to 1.70 Td, pressures from 13.4 to 40.3 kPa, and a temperature of 294 K. Three recently published σm values for xenon have been tested and shown to be incompatible with both the present drift velocity and DT/μ measurements. 28 refs., 2 tabs., 6 figs