
TY  - JOUR
A1  - Crompton, RW 
A1  - Elford, MT 
A1  - Jory, RL 
T1  - The Momentum Transfer Cross Section for Electrons in Helium
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1967
VL  - 20
IS  - 4
SP  - 369
EP  - 400
KW  - 
UR  - https://doi.org/10.1071/PH670369 
N2  - 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. 
ER  -

