Accession Number:

AD0435090

Title:

ATOMIC COLLISION PROCESSES RELATING TO THE IONOSPHERE

Descriptive Note:

Semiannual technical Summary rept. 1 Sep 1963-28 Feb 1964

Corporate Author:

WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA

Personal Author(s):

Report Date:

1964-02-28

Pagination or Media Count:

36.0

Abstract:

The cross section for vibrational excitation of N2, CO, and H2 by electron impact is measured using a double electrostatic analyzer. Electrons are examined after scattering from the molecules at an angle of 72 degrees. Both N2 and CO exhibit a small vibrational cross section to the first state below 1.7 eV and 1.0 eV, respectively, which is attributed to direct excitation by electron impact. Above these energies, many vibrational states are excited and the cross section becomes large it is postulated that the excitation proceeds via a compound state of N2 and CO. The peak of the cross section occurs at 2.3 eV in N2 and 1.75 eV in CO. In hydrogen, the cross section to the first vibrational state predominates the cross section to the second vibrational state of H2 is about 14 of the first state, at an energy of 3.4 eV.

Subject Categories:

  • Atmospheric Physics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE