Accession Number : AD0746327

Title :   Measurements of Temperatures of Vibrationally Excited N2.

Descriptive Note : Rept. for Feb 71-Feb 72,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Young,Stephen J. ; Horn,Kenneth P.

Report Date : 14 JUN 1972

Pagination or Media Count : 49

Abstract : A comparison of the vibrational and rotational temperatures of microwave discharged N2 as measured by the CO tracer and the Penning ionization with He(2 triplet S) techniques has been performed in a flow tube apparatus. A vibrational temperature range of 1000 to 3000K was covered at a kinetic temperature of 350K. A detailed analysis of each technique is presented. The effect of pressure quenching of the N2(+)(1-) radiation occurring in the Penning ionization technique and the effect of vibrational temperature gradient across the flow tube in the CO tracer technique are discussed. The work represents the first experimental confirmation of this relationship. The agreement of rotational temperatures implied by the N2(+) and CO spectra indicates that the rotational distribution in BN2(+)(v) is not significantly distorted from the N2 equilibrium distribution by the heavy He(2 triplet S) impact. (Author)

Descriptors :   (*NITROGEN, EMISSIVITY), TEMPERATURE, MOLECULAR ENERGY LEVELS, VIBRATION, CARBON MONOXIDE, HELIUM, EXCITATION, GAS IONIZATION, UPPER ATMOSPHERE

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE