Accession Number : AD0736440

Title :   Vibrational Population of the A triplet Sigma(u)(+) and B triplet Pi(g) States of N2 in Normal Auoras.

Descriptive Note : Research rept. Nov 70-Dec 71,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Cartwright,David C. ; Trajmar,Sandor ; Williams,Walter

Report Date : 15 JAN 1972

Pagination or Media Count : 36

Abstract : New electron impact excitation cross sections for the six lowest triplet states (A, B, W, C, E, D) of N2 have been employed and the coupled equations of statistical equilibrium solved to obtain the virbrational population of each electronic state. The results show that cascade from high levels of A triplet Sigma(u)(+) state and from the W triplet Delta(u) state plays a significant role in populating the lower vibrational levels of the B-state and hence the character of its 'apparent' excitation cross section. (Author)

Descriptors :   (*NITROGEN, EXCITATION), (*ELECTRON IRRADIATION, NITROGEN), (*AURORAE, NITROGEN), DIFFERENTIAL CROSS SECTIONS, MOLECULAR ENERGY LEVELS, VIBRATION, UPPER ATMOSPHERE, ELECTRON TRANSITIONS, AFTERGLOWS

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE