
%0 Journal Article
%A Crompton, RW 
%A Elford, MT 
%A Jory, RL 
%T The Momentum Transfer Cross Section for Electrons in Helium
%J Australian Journal of Physics
%D 1967/08/01
%V 20
%N 4
%P 369-400
%K 
%R https://doi.org/10.1071/PH670369
%U https://www.publish.csiro.au/paper/PH670369 
%X Measurements of the drift velocity, the ratio of diffusion coefficient to mobility, and the "magnetic drift velocity" for electrons in helium have been made at 293°K in the range 1.8 X 10&#8722;19 E/N < 3 X 10&#8722;17 V cm2. From an analysis of the drift velocity data, an energy-dependent momentum transfer cross section has been derived for which an error of less than ± 2 % is claimed over the central portion of the energy range. The cross section agrees with the theoretical cross section of La Bahn and Callaway to within 2% over the whole energy range. The agreement with the cross section derived by a number of procedures from the total elastic scattering cross section measured by Golden and Bandel is less satisfactory. The drift data are sufficiently accurate to enable a search to be made for the effects of fine structure in the cross section at low energy. The results do not support the existence of such structure. 
