Abstract
We have used resonant multiphoton optogalvanic spectroscopy to observe atomic hydrogen and oxygen, two of the most important radicals in combustion chemistry, in atmospheric pressure flames. Ground-state hydrogen or oxygen atoms were excited by resonant two-photon absorption, with subsequent single-photon ionization and the ion-electron pairs detected by electrodes mounted in or near the flame. This represents the first demonstration of direct in situ optical detection of atomic hydrogen in a combustion environment.1
© 1983 Optical Society of America
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