Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa41a..18h&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA41A-18
Physics
0310 Airglow And Aurora, 0317 Chemical Kinetic And Photochemical Properties, 0342 Middle Atmosphere: Energy Deposition, 0343 Planetary Atmospheres (5405, 5407, 5409, 5704, 5705, 5707), 0399 General Or Miscellaneous
Scientific paper
Dayside photodissociation of O2 and CO2 in the atmospheres of Earth, Venus, and Mars produces oxygen atoms that eventually undergo three-body recombination O + O + M -> O2* + M The variety of electronic states produced is observable as nightglow emissions, which have been the subject of many laboratory and interpretive investigations. Here we review the current understanding of the overall temperature-dependent rate coefficient for three-body recombination of oxygen atoms and describe a strategy for its measurement. The most recent measurement [1] is almost 30 years old. The most comprehensive review [2] is more than 25 years old and shows that the absolute rate coefficients for recombination and the reverse process, collision-induced dissociation, as well as the dependence on temperature and collider, are poorly determined, in spite of the relatively narrow error bars reported in the various studies. The most recent high-temperature dissociation study [3] actually increases the divergence. We plan experiments with a commercial F2 laser, providing roughly 50 mJ of 157 nm radiation in a 3-4 mm beam, to achieve greater than 80% dissociation of molecular oxygen, in the range from 0.5 to 5 torr. In a high-pressure N2 background (30-200 torr) the oxygen atoms will recombine in a time scale from 0.1 to 10 ms, as monitored by 845 nm fluorescence excited by two photons at 226 nm. [1] I. M. Campbell and C. N. Gray, Chem. Phys. Lett. 18, 607 (1973). [2] D. L. Baulch, D. D. Drysdale, J. Duxbury, and S. J. Grant, Evaluated Kinetic Data for High Temperature Reactions Vol. 3 ``Homogeneous Gas Phase Reactions of the O2--O3 System, the CO--O2--H2 System, and of Sulphur-Containing Species," (Butterworths, London, 1976). [3] V. Naudet, S. Abid, and C. E. Paillard, J. Chim. Phys. 96, 1123 (1999).
Huestis David L.
Kalogerakis Konstantinos S.
No associations
LandOfFree
Three-Body Recombination of Oxygen Atoms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Three-Body Recombination of Oxygen Atoms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-Body Recombination of Oxygen Atoms will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1722439