Lee, S.
, Hoobler, R.
and Leone, S.
(2000),
A Pulsed Laval Nozzle Apparatus With Laser Ionization Mass Spectroscopy for Direct Measurements of Rate Coefficients at Low Temperatures With Condensable Gases, Review of Scientific Instruments
(Accessed December 13, 2024)
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A Pulsed Laval Nozzle Apparatus With Laser Ionization Mass Spectroscopy for Direct Measurements of Rate Coefficients at Low Temperatures With Condensable Gases
Published
Author(s)
S Lee, R J. Hoobler,
Abstract
A pulsed Laval nozzle, low Mach number supersonic expanison kinetics apparatus has been constructed to study neutral-neutral kinetics by a rather general laser photolysis initiation and laser photoionization detection of the product species. This new apparatus permits laboratory studies of low temperature rate coefficients (e.g., 70-170K) on condensable gases that have insufficient vapor pressures at low temperatures for conventional methods of kinetic measurements. The design considerations, the uniformity of the reaction zone over 10-20 cm, and the skimer sampling of the pulsed Laval expansion are examined. The direct measurement of a rate coefficient at 90 K is also demonstrated using this new apparatus.Citation
Review of Scientific Instruments
Volume
71
Issue
No. 4
Pub Type
Journals
Keywords
laval nozzle, low temperature kinetics
Citation
Issues
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Created March 31, 2000, Updated October 12, 2021