Smyth, K.
and Tjossem, P.
(1990),
Signal Detection Efficiency in Multiphoton Ionization Flame Measurements, Applied Optics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=912545
(Accessed April 25, 2024)
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Signal Detection Efficiency in Multiphoton Ionization Flame Measurements
Published
Author(s)
K C. Smyth, P. Tjossem
Abstract
Resonance-enhanced multiphoton ionization (MPI)has been successfully applied to the detection of numerous free radicals and stable species in flames, including H atom,1 -6 0 atom, 3' 4' 7 C atom, 8'9 CH-,9 CO,5 "10 02,9 NO.W11,1 2 P.,'1 3 CH. 3,8 "145"1HCO.,15,16 C2 0,5 and trans-,3-butadiene.17 Multiphoton ionization methods exhibit high sensitivity and are the only practical optical approach for monitoring minor species when fluorescence quantum yields are low, such as for the methyl (CH3 .) radical. Low fluorescence quantum yields are also expected for larger hydrocarbon radicals of combustion interest, such as ethynyl (C2H-), vinyl (C2H3O), and phenyl (C6H5O). Active investigation to find suitable electronic transitions for MPI detection of these species is currently underway, since they are presently observable only in environments where molecular beam mass spectrometric sampling can be utilized, for example, in low pressure premixed flames.Citation
Applied Optics
Volume
29
Issue
No. 33
Pub Type
Journals
Download Paper
Citation
Created November 20, 1990, Updated February 19, 2017