
TY  - JOUR
A1  - Crompton, RW 
A1  - Elford, MT 
A1  - Robertson, AG 
T1  - The Momentum Transfer Cross Section for Electrons in Helium Derived from Drift Velocities at 77°K
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1970
VL  - 23
IS  - 5
SP  - 667
EP  - 682
KW  - 
UR  - https://doi.org/10.1071/PH700667 
N2  - 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. 
ER  -

