Accession Number : AD0783211

Title :   Excitation of Infrared Auroral Emissions in Collisions of H(+) and H with N2.

Descriptive Note : Interim rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Birely,John H. ; Johnson,Peter A.

Report Date : 05 JUL 1974

Pagination or Media Count : 10

Abstract : Cross sections for emission of the (N2(+)(A doublet Pi(u) - X doublet Sigma (g)(+)) Meinel (2,0) and the (N2(B triplet Pi(g) - A triplet Sigma (u)(+)) first positive (1P) (3,1) bands in 0.5 to 25 keV H(+) and H impact on N2 are reported. It is shown that, in a hydrogen aurora, H(+) and H impact make comparable contributions to the Meinel band intensity, but that neutral hydrogen impact is the predominant source of 1P emission. The vibrational distribution of N2(+) formed in 25 keV H(+) and H impact with v' = 2-5 is shown to be in good agreement with the prediction of a simple, Franck-Condon model. (Modified author abstract)

Descriptors :   *Aurorae, *Nitrogen, *Hydrogen, *Emission, Particle collisions, Cross sections, Ions, Atoms, Molecular energy levels, Electron transitions, Protons

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE