Accession Number : AD0738652

Title :   The IR Emission Spectrum of N2 Excited Auroral Conditions.

Descriptive Note : Rept. for Feb-Nov 71,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

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

Report Date : 01 MAR 1972

Pagination or Media Count : 20

Abstract : Recently determined experimental and theoretical cross sections for electron impact excitation of six triplet states of N2 (A, B, W, C, E, D) have been utilized to predict the absolute IR volume emission rates from N2 under night time auroral conditions. Secondary electron fluxes appropriate to an IBC II normal aurora were used in the calculations. The cascade contributions coupling the various electronic states were included as well as the most important quenching processes. The results indicate that the B to A, A to B and W to B, B to W cascade processes, which are important in the population of the A, B, and W states, produce appreciable radiation in the 1 - 5 micrometers wavelength region. (Author)

Descriptors :   (*AURORAE, INFRARED SPECTRA), (*NITROGEN, AURORAE), EXCITATION, ELECTRON TRANSITIONS, INTENSITY

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE