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(A) Charged Particles in the Upper Atmosphere. (B) Recombination Coefficients
[Technical Report, Technical Report]
GEOPHYSICS CORP OF AMERICA BOSTON MA
Pagination or Media Count:
The measurements of Crompton and Sutton 1952 of the Townsend energy coefficient relating to the diffusion of slow electrons in molecularnitrogen taken together with the measurements of the electron drift velocity by Nielsen 1936 can be used to derive an averaged momentum transfer cross section Q. Crompton and Sutton deduce that Q decreases as the electron velocity decreases but their observations are restricted to temperatures above about 750 deg K. The observed decrease is in accord with the microwave conductivity measurements of Phelps, Fundingsland and Brown 1951 which yield a value of 4 X 10exp -16 sq cm at an electron energy of about 0.04 eV. It is in disagreement with the results of microwave conductivity measurements by Anderson and Goldstein 1956 who deduce that Q increases with decreasing velocity to a value of 17 x 10exp -16 sq cm at an energy of 0.04 eV.
[A, Approved For Public Release]