
%0 Journal Article
%A Crompton, RW 
%A Elford, MT 
%A Robertson, AG 
%T The Momentum Transfer Cross Section for Electrons in Helium Derived from Drift Velocities at 77°K
%J Australian Journal of Physics
%D 1970/06/01
%V 23
%N 5
%P 667-682
%K 
%R https://doi.org/10.1071/PH700667
%U https://www.publish.csiro.au/paper/PH700667 
%X Drift velocities of electrons in helium at 76.8°K have been measured for 8 X lO&#8722;20 &#8804; E/N &#8804; 2 X lO&#8722;17 V cm2. From these data, and the earlier measurements of Crompton, Elford, and Jory made at 293°K, the energy-dependent momentum transfer cross section has been determined for electrons with energies between 0.008 and 6 eV. The present cross section agrees with that of Crompton, Elford, and Jory to within 1 %. The extension of the energy range to 8 meV permits a direct determination of the scattering length, for which a value of 1.19 ao is obtained. 
