Electron Transport Coefficients in Hydrogen and Deuterium

Measurements have been made of the drift velocity W and the ratio of diffusion coefficient to mobility D/μ for low energy electrons in deuterium at 77�K, and of D/μ in hydrogen at 77 and 293�K. Tabulated data are given for D/μ within the range 2 x 10−20 ≤ E/N ≤ 1.2 x 10−16 V cm2 and for W within the range 8 x 10−20 ≤ E/N ≤ 9.5 x 10−17 V cm2. The low temperature results show a considerably reduced scatter when oompared with previously published data and are of an aocuracy comparable with the results of recent measurements made at room temperature. The data obtained complement those of Lowke and of McIntosh thus completing a set from which a more acourate determination of low energy elastic and inelastic cross sections can be made.