Accession Number:

ADA210424

Title:

Quenching of N2(a(1IIg), V' = O) by N2, O2, CO, CO2, CH4, H2 and Ar

Descriptive Note:

Corporate Author:

AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Personal Author(s):

• Marinelli, William J.
• Kessler, William J.
• Green, Byron D.
• Blumberg, William A.

Report Date:

1989-02-15

Pagination or Media Count:

9.0

Abstract:

We have determined quenching rate coefficients for N2a 1 pig, VO by Nitrogen Oxygen Hydrogen, CO2, Ar, CH4, and CO using two photon laser excitation. Quenching by N2 appears to proceed via collisional coupling to N2 a 1 Sigma U -, vO with a rate coefficient of 2.2 or - 10 to the -11 power CC3 molecule s. Quenching by Ar is nearly as efficient. Gas-kinetic rate coefficients are obtained for quenching by CO, O2, H2, CO2, and CH4. Collisional energy transfer from N2a,O to COA is observed in these experiments. However, quenching by O2, H2, CO2, and CH4 is thought to be reactive. Keywords Carbon dioxide Argon Methane Carbon monoxide Lyman Birge Hopfield bands Electronic states Reprints.

Descriptors:

• *PHOTOCHEMICAL REACTIONS
• *REACTION KINETICS
• *QUENCHING
• *LASER APPLICATIONS
• *NITROGEN
• HYDROGEN
• QUENCHING(INHIBITION)
• OXYGEN
• ELECTRONIC STATES
• COEFFICIENTS
• PHOTONS
• CARBON MONOXIDE
• METHANE
• CARBON DIOXIDE
• ARGON
• COLLISIONS
• LASERS
• ENERGY TRANSFER
• RATES
• EXCITATION
• REPRINTS
• GASES

Subject Categories:

• Physical Chemistry
• Radiation and Nuclear Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE