
%0 Journal Article
%A Francey, JLA 
%A Jones, DA 
%T Anisotropic Diffusion in Electron Swarms
%J Australian Journal of Physics
%D 1975/10/01
%V 28
%N 5
%P 533-542
%K 
%R https://doi.org/10.1071/PH750533
%U https://www.publish.csiro.au/paper/PH750533 
%X We show that the distribution functions derived by Parker (1963) in his analysis of the TownsendHuxley experiment can be used to calculate DL/D, the ratio of longitudinal to isotropic diffusion coefficients for electron swarms in electrostatic fields in gases. In the case of a constant collision frequency interaction our results agree with previous calculations, whilst for a constant mean free path we find DL/D = 0·58. This result is some 16% higher than previously published values but provides better agreement with experiment for electrons in helium. 
