Accession Number : AD0751466

Title :   Measurement of Vibrational Temperature of CO and N2 Using the He(2 triplet S) Penning Ionization Technique.

Descriptive Note : Report for Feb-Jul 72,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Young,Stephen J.

Report Date : 25 SEP 1972

Pagination or Media Count : 21

Abstract : The vibrational temperatures of N2 and CO in binary gas mixture and in the VV quasi-equilibrium regime of high vibrational temperature and low kinetic temperature were measured in a flow tube apparatus. The Penning ionization with He(2 triplet S) technique was used to determine the vibrational temperatures of both gases. The Treanor-Teare expression relating vibrational temperatures relating vibrational temperatures for such conditions was verified. The formulation of the Penning ionization technique for CO allowed the CO rotational energy and the kinetic energy of relative motion between CO and He to play a role in the normally nonenergetically allowed CO(X, 0) to CO(+)(B,1) excitation reaction. The unexpected result of a collisional quenching rate that is smaller for CO(+)(B,1) than for CO(+)(B,0) was also observed. (Author)

Descriptors :   (*CARBON MONOXIDE, *MOLECULAR ENERGY LEVELS), (*NITROGEN, MOLECULAR ENERGY LEVELS), VIBRATION, EXCITATION, GAS IONIZATION, TEMPERATURE, QUENCHING(INHIBITION), HELIUM

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE