(A) Charged Particles in the Upper Atmosphere. (B) Recombination Coefficients
Abstract
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 10(exp -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 10(exp -16) sq cm at an energy of 0.04 eV.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1961
- Accession Number
- AD0266519
Entities
People
- Alexander Dalgarno