Accession Number:

AD0266519

Title:

(A) Charged Particles in the Upper Atmosphere. (B) Recombination Coefficients

Descriptive Note:

[Technical Report, Technical Report]

Corporate Author:

GEOPHYSICS CORP OF AMERICA BOSTON MA

Personal Author(s):

• Dalgarno, Alexander

Report Date:

1961-06-01

Pagination or Media Count:

126

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 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.

Descriptors:

• ionization
• electrons
• charged particles
• ionizing radiation
• scattering
• accuracy
• electron energy
• quantum numbers
• charge transfer
• diffusion coefficient
• electrical conductivity
• measurement
• proton beams
• radio waves
• coefficients
• conductivity
• dissociation

Subject Categories:

• Atmospheric Physics
• Inorganic Chemistry
• Electricity and Magnetism
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

[A, Approved For Public Release]