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Laser-induced fluorescence detection strategies for sodium atoms and compounds in high-pressure combustorsA variety of laser-induced fluorescence schemes were examined experimentally in atmospheric pressure flames to determine their use for sodium atom and salt detection in high-pressure, optically thick environments. Collisional energy transfer plays a large role in fluorescence detection. Optimum sensitivity, at the parts in 10 exp 9 level for a single laser pulse, was obtained with the excitation of the 4p-3s transition at 330 nm and the detection of the 3d-3p fluorescence at 818 nm. Fluorescence loss processes, such as ionization and amplified spontaneous emission, were examined. A new laser-induced atomization/laser-induced fluorescence detection technique was demonstrated for NaOH and NaCl. A 248-nm excimer laser photodissociates the salt molecules present in the seeded flames prior to atom detection by laser-induced fluorescence.
Document ID
19930068426
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Weiland, Karen J. R.
(SRI International, Molecular Physics Lab., Menlo Park, CA; NASA, Lewis Research Center Cleveland, OH, United States)
Wise, Michael L.
(SRI International, Molecular Physics Lab., Menlo Park, CA; Colorado Univ. Boulder, United States)
Smith, Gregory P.
(SRI International, Molecular Physics Lab. Menlo Park, CA, United States)
Date Acquired
August 16, 2013
Publication Date
July 20, 1993
Publication Information
Publication: Applied Optics
Volume: 32
Issue: 21
ISSN: 0003-6935
Subject Category
Inorganic And Physical Chemistry
Accession Number
93A52423
Funding Number(s)
CONTRACT_GRANT: DE-AC21-87MC-24012
Distribution Limits
Public
Copyright
Other

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